Bibliografie tematiche / Electron configuration

Indice

Articoli di riviste
Tesi
Libri
Capitoli di libri
Atti di convegni
Rapporti di organizzazioni

Letteratura scientifica selezionata sul tema "Electron configuration"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 30 luglio 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Electron configuration".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "Electron configuration"

Pressler, David E. "Atomic Electron Configuration". International Journal of Modern Physics A 16, supp01c (settembre 2001): 922–24. http://dx.doi.org/10.1142/s0217751x01008503.

Testo completo

Abstract (sommario):

In this work I suggest that early twentieth century theoretical physicists did not have enough facts or experimental data to formulate a consistent atomic model and as a result the concept of the atom needs revised. I conclude that the new atomic model presented is based only on first principles, is easy to understand and visualize, and provides such a significant theoretical advance as to be a final theory.

Gli stili APA, Harvard, Vancouver, ISO e altri

Yang, Qing, e J. D. Fan. "Topologic configuration of electron". Modern Physics Letters A 33, n. 26 (24 agosto 2018): 1850163. http://dx.doi.org/10.1142/s0217732318501638.

Testo completo

Abstract (sommario):

Motion of an electron is much different from that of a kind of matter in classical mechanics. Although it is impossible to directly observe the configuration of a bare electron, it is never as simple as to treat it as a three-dimensional (3D) particle in the microscopic world because the electron itself certainly has its own topological configuration, so that it presents a field of a unit charge and a spin, etc. An electron produces a magnetic field in motion and also can radiate or absorb an electromagnetic field in its accelerating motions. Thus, the topological configuration of an electron must be related or similar to the configurations of the magnetic field and electromagnetic wave. Starting from the topological configuration of a single electromagnetic wave, it is possible to derive that an electron is a quantized left-hand Möbius strip, on the center of which there exists an anti-neutrino. The Möbius strip excites a [Formula: see text] circumference of a unit negative charge and a linear electric field of a [Formula: see text] torsion and can explain the wave feature of the electron and the essential cause of producing a magnetic field and radiating an electromagnetic wave as well as predict that the second-order tensor field among the three quarks in a proton has a topological configuration of right-hand three-leaf knot and can excite a [Formula: see text] circumference of a unit positive charge and a linear electric field of a [Formula: see text] torsion, which is just allelomorphic to an electron.

Gli stili APA, Harvard, Vancouver, ISO e altri

Mercero, José M., Joseph E. Fowler, Cecilia Sarasola e Jesus M. Ugalde. "Atomic configuration-interaction electron-electron counterbalance densities". Physical Review A 59, n. 6 (1 giugno 1999): 4255–58. http://dx.doi.org/10.1103/physreva.59.4255.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Ulianov MSc, PhD, Policarpo Yoshin. "Comparison of pauling and Ulianov electron distribution models". Material Science & Engineering International Journal 8, n. 2 (27 maggio 2024): 49–54. http://dx.doi.org/10.15406/mseij.2024.08.00235.

Testo completo

Abstract (sommario):

This study presents a comprehensive comparison between the traditional Pauling electron distribution model and the innovative Ulianov model proposed by Dr. Policarpo Yoshin Ulianov. The Pauling model, which relies on the Aufbau principle, Hund’s rule, and the Pauli Exclusion Principle, has been a cornerstone in understanding electron configurations within atoms, organizing electrons into s, p, d, and f orbitals. In contrast, the Ulianov model introduces a novel linear progression for electron occupancy, proposing additional orbitals (g and h) to account for electron distribution in a manner that deviates from conventional methodologies. Through an analytical comparison, this paper evaluates both models in terms of functionality, energy levels, and methodology, highlighting the advantages and disadvantages inherent to each. The Pauling model is recognized for its empirical support and wide acceptance, offering a well-established framework for electron configuration. Meanwhile, the Ulianov model provides a fresh perspective that could potentially explain anomalies unaddressed by the Pauling model and predict new chemical properties, despite its current lack of empirical validation. Concluding, while the Pauling model remains the standard for electron configuration, the Ulianov model’s innovative approach challenges existing paradigms and invites further investigation into its validity and potential applications in the scientific community.

Gli stili APA, Harvard, Vancouver, ISO e altri

Mulyawati, Tin, e Eka Purwanda. "Implementasi Alat Peraga “Ikon-E” Merupakan Kunci Sukses Memahami Konfigurasi Elektron (Cara Pengisian Konfigurasi Elektron Sebagai Media Pembelajaran Inovatif di SMA)". NUSRA : Jurnal Penelitian dan Ilmu Pendidikan 5, n. 2 (28 maggio 2024): 700–706. http://dx.doi.org/10.55681/nusra.v5i2.2631.

Testo completo

Abstract (sommario):

This research aims to evaluate the effectiveness of using electron configuration content tools ("e-icons") as a learning medium at the Senior High School (SMA) level. Electron configuration is an important concept in chemistry and understanding it can improve students' understanding of class X atomic structure material. Research data will be collected through a knowledge test on the group of students who use the "e-ikon" tool, called the experimental group, and the group of students without using the "e-ikon" tool, called the control group. Also, through a questionnaire that assesses students' perceptions of the use of electron configuration content tools. Data analysis will be conducted to determine whether the use of the electron configuration content tool can improve students' understanding and help them better internalize the concept of electron configuration. The conclusion that can be drawn is that the scores of students from the experimental class group have a higher average score than the average scores of students from the control class group. This means that the "e-icon" tool has a real influence on students in understanding electron configurations. The time needed for teachers to explain is shorter with the help of the “e-icon” tool. Students become happier studying chemistry. Filling in the configuration using tools lasts a long time in the student's memory.

Gli stili APA, Harvard, Vancouver, ISO e altri

Stojković, S. M., J. P. Šetrajčić e Igor Vragović. "Electron Configuration of Carbon Nanotubes". Materials Science Forum 352 (agosto 2000): 129–34. http://dx.doi.org/10.4028/www.scientific.net/msf.352.129.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pe rez-Garrido, M. Ortun-O, A. M. S, A. "Configuration space in electron glasses". Philosophical Magazine B 81, n. 2 (1 febbraio 2001): 151–62. http://dx.doi.org/10.1080/13642810010009366.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pérez-Garrido, A., M. Ortuño, A. M. Somoza e A. Díaz-Sánchez. "Configuration space in electron glasses". Philosophical Magazine B 81, n. 2 (febbraio 2001): 151–62. http://dx.doi.org/10.1080/13642810108216532.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Kumar, Amit, Krishna Katuri, Piet Lens e Dónal Leech. "Does bioelectrochemical cell configuration and anode potential affect biofilm response?" Biochemical Society Transactions 40, n. 6 (21 novembre 2012): 1308–14. http://dx.doi.org/10.1042/bst20120130.

Testo completo

Abstract (sommario):

Electrochemical gradients are the backbone of basic cellular functions, including chemo-osmotic transport and ATP synthesis. Microbial growth, terminal respiratory proteins and external electron transfer are major pathways competing for electrons. In BESs (bioelectrochemical systems), such as MFCs (microbial fuel cells), the electron flow can be via soluble inorganic/organic molecules or to a solid surface. The flow of electrons towards a solid surface can be via outer-membrane cytochromes or electron-shuttle molecules, mediated by conductive protein nanowires or extracellular matrices. In MECs (microbial electrolysis cells), the anode potential can vary over a wide range, which alters the thermodynamic energy available for bacteria capable of donating electrons to the electrode [termed EAB (electroactive bacteria)]. Thus the anode potential is an important electrochemical parameter determining the growth, electron distribution/transfer and electrical activity of films of these bacteria on electrodes. Different optimal applied potentials to anodes have been suggested in the literature, for selection for microbial growth, diversity and performance in biofilms on electrodes. In the present paper, we review the effects of anode potentials on electron-transfer properties of such biofilms, and report on the effect that electrochemical cell configuration may have on performance.

Gli stili APA, Harvard, Vancouver, ISO e altri

Morehouse, Aaron, Kelton C. Ireland e Gobinda C. Saha. "An Investigation into the Effects of Electric Field Uniformity on Electrospun TPU Fiber Nano-Scale Morphology". Micromachines 14, n. 1 (13 gennaio 2023): 199. http://dx.doi.org/10.3390/mi14010199.

Testo completo

Abstract (sommario):

ANSYS Maxwell was used to replicate the conditions of two potential electrospinning configurations: a needle–plate and a parallel-plate configuration. Simulations showed that the electric field generated within the parallel-plate configuration was much more uniform than that within the needle–plate configuration. Both configurations were assembled and used electrospin fibers at three different spinning distances (10 cm, 12 cm, and 15 cm), at a consistent electric field strength of 1.7 kV/cm. Scanning electron microscopy was used to compare the morphologies of the fibers produced in both configurations in order to confirm whether a more uniform electric field yielded thinner fibers. The results show that the needle–plate configuration produced finer fibers than the parallel-plate configuration at all three spinning distances. However, there was no difference in the fiber diameters produced at the 12 and 15 cm spinning distances within the needle–plate configuration, implying thinning may only occur up to a certain distance in this configuration.

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Tesi sul tema "Electron configuration"

Ozfidan, Asli Isil. "Electron-Electron Interactions in Optical Properties of Graphene Quantum Dots". Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32857.

Testo completo

Abstract (sommario):

In this thesis, I present a theory of electron-electron interactions in optical properties of graphene and transition metal dichalcogenides (TMDCs), two dimensional nanostructures with a hexagonal lattice. We start our discussion with electron-electron interactions in artificial rings for which the strength of interactions can be varied and exact results can be obtained. The artificial rings are described by the extended Hubbard model and solved using an exact diagonalization method in real and Fourier space of configurations. Exact and analytical results for charged rings are obtained in the limit of very strong interactions. For the quadruple quantum dot ring and the artificial benzene ring, we find that chirality leads to the appearance of a topological phase and an effective gauge field that determines the ground state character with varied interaction strength. For the charged artificial benzene ring, our numerical results show a transition from a degenerate to a non-degenerate ground state with increasing strength of Coulomb interactions. We show that the artificial gauge and the transition in the ground state can be detected as changes in the optical absorption spectrum. In the second part of the thesis, the electronic and optical properties of colloidal graphene quantum dots (CGQD) consisting of many benzene rings are determined. The CGQDs are described by the combination of tight binding, mean field Hartree Fock (HF) and Configuration Interaction methods. The single particle properties are described through the tight binding method based on the pz carbon orbitals. Screened Coulomb interactions between electrons, including direct, exchange, and scattering matrix elements, are calculated using Slater pz orbitals. HF ground states corresponding to semiconductor, Mott-insulator, and spin-polarized phases are obtained as a function of the strength of the screened interaction versus the tunnelling matrix element. The many-body ground and excited states in the semiconducting phase are constructed as a linear combination of a finite number of electron-hole pair excitations from the HF ground state (GS). The Hamiltonian is constructed in the subspace of multi-pair HF excitations to obtain the low energy, many body states by exact diagonalization using the Lanczos method. The degeneracy of the valence- and conduction-band edges of 3-fold rotationally symmetric CGQDs is shown to lead to a characteristic exciton and bi-exciton spectrum. The low-energy exciton spectrum is predicted to consist of two bright-singlet exciton states corresponding to two circular polarizations of light and a lower-energy band of dark singlets and dark triplets. The robustness of the bright degenerate singlet pair against correlations in the many-body state is demonstrated as well as the breaking of the degeneracy by the lowering of symmetry of the CGQD. Band edge biexciton energies and binding energies are predicted, and two degenerate exciton (X) states and a corresponding biexciton (XX) state are identified for the generation of an XX-X cascade. The Auger coupling of XX and excited X states is determined and our theoretical results are compared with experimental absorption and non-linear transient absorption spectra. In the third and final part of the thesis, we replace the two non-equivalent carbon atoms of the graphene hexagonal lattice with a heavy transition-metal atom M, (e.g. Mo or W) and a dimer X2 (e.g. S). The bandstructure of a monolayer MX2 is calculated using density functional theory (DFT). It is shown that a direct gap opens up at all K points of the Brillouin zone and strong spin orbit coupling leads to spin splitting of the valence and conduction bands and emergence of valley dependent optical selection rules. Finally, the magnetoluminescence experiments on a monolayer WS2 emitting circularly polarized light upon its excitation by unpolarized light are described. The emission of polarized light in zero magnetic field is explained by the possibility of formation of a valley polarized 2D electron gas in unintentionally doped WS2.

Gli stili APA, Harvard, Vancouver, ISO e altri

Kimani, Peter Borgia Ndungu. "Electronic structure and electron correlation in weakly confining spherical quantum dot potentials". abstract and full text PDF (free order & download UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3307466.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Reyes, Vasquez David Fernando. "Magnetic configurations in Co-based nanowires explored by electron holography and micromagnetic calculations". Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30356/document.

Testo completo

Abstract (sommario):

Les nanofils magnétiques suscitent un intérêt considérable depuis une quinzaine d'années en raison de leur utilisation potentielle pour la spintronique. Leur utilisation potentielle dans des dispositifs exige une description détaillée des états magnétiques locaux des nanofils. Dans cette thèse, j'ai étudié qualitativement et quantitativement les états magnétiques à l'état rémanent de nanofils magnétiques par holographie électronique (EH) et simulations micromagnétiques. Une analyse détaillée a été réalisée sur deux types de nanofils : multicouches Co/Cu et nanofils FeCoCu à diamètre modulé. Les deux systèmes ont été synthétisés par électrodéposition dans des membranes. La combinaison des caractérisations magnétiques, structurales et chimiques locales obtenues dans un TEM avec des simulations micromagnétiques ont permis une description complète de ces systèmes. Pour les nanofils multicouches Co / Cu, j'ai analysé l'influence des épaisseurs de cobalt et de cuivre ou de la structure cristalline de Co sur la configuration magnétique de nanofils isolés. Après l'application d'un champs de saturation dans des directions parallèle et perpendiculaire à l'axe des nanofils, j'ai étudié les configurations magnétiques pour les épaisseurs de Co / Cu suivantes : 25nm / 15nm, 25nm / 45nm, 50nm / 50nm et 100nm / 100nm. Trois configurations principales à la rémanence ont été trouvées : (i) un couplage antiparallèle entre les couches Co, (ii) une structure mono-domaine et (iii) un état vortex. Dans les nanofils Co (25 nm) / Cu (15 nm), en fonction de la direction du champ de saturation, les couches de Co peuvent présenter soit un couplage antiparallèle (champ de saturation perpendiculaire) ou un couplage de type vortex (champ de saturation en parallèle) avec un coeur aligné parallèlement à l'axe du fil. Cependant, 10% des nanofils étudié présente un état mono-domaine quel que soit le champ de saturation parallèle et perpendiculaire. Dans le cas Co (50 nm) / Cu (50 nm) et Co (25 nm) / Cu (45 nm), l'épaisseur plus grande de Cu séparant les couches ferromagnétiques réduit l'interaction magnétique entre des couches de Co voisines. L'état rémanent est donc formé de la combinaison de couches de Co monodomaines orientés perpendiculairement à l'axe du fil et de certains états vortex. Enfin pour la configuration Co (100 nm) / Cu (100 nm), un état monodomaine est observé quel que soit la direction du champ appliqué lors de la saturation. Toutes ces configurations magnétiques ont été déterminées et simulées à l'aide des calculs micromagnétiques jusqu'à ce qu'un accord quantitatif avec les résultats expérimentaux aient été obtenus. J'ai ainsi pu expliquer l'apparition et la stabilité de ces configurations en fonction des principaux paramètres magnétiques tels que l'échange, la valeur et la direction de l'anisotropie et l'aimantation. La comparaison entre les simulations et les résultats expérimentaux ont ainsi servi à déterminer précisément la valeur de ces paramètres. Dans les nanofils FeCoCu à diamètre modulé, une description détaillée de l'influence de la géométrie sur la configuration locale de spins a été réalisée. Les expériences d'holographie électronique montrent une structure magnétique monodomaines avec l'aimantation alignée longitudinalement. Cependant, nous avons trouvé grâce à des simulations micromagnétiques que cette configuration monodomaine est fortement affectée par la variation locale du diamètre. L'étude en particulier du champ de fuite mais aussi du champ démagnétisant à l'intérieur des nanofils a mis en évidence le rôle prépondérant des charges magnétiques aux zones de variation de diamètre. De plus l'aimantation présente une structure plus compliquée qu'un simple alignement le long de l'axe du fil. Enfin les résultats que j'ai obtenus ont abouti à une interprétation différente d'expériences précédentes en MFM
Magnetic nanowires have raised significant interest in the last 15 years due to their potential use for spintronics. Technical achievements require a detailed description of the local magnetic states inside the nanowires at the remnant state. In this thesis, I performed quantitative and qualitative studies of the remnant magnetic states on magnetic nanowires by Electron Holography (EH) experiments and micromagnetic simulations. A detailed investigation was carried out on two types of nanowires: multilayered Co/Cu and diameter-modulated FeCoCu nanowires. Both systems were grown by template-based synthesis using electrodeposition process. The combination of local magnetic, structural and chemical characterizations obtained in a TEM with micromagnetic simulations brought a complete description of the systems. In the multilayered Co/Cu nanowires, I analysed how different factors such as the Co and Cu thicknesses or the Co crystal structure define the remnant magnetic configuration into isolated nanowires. After applying saturation fields along directions either parallel or perpendicular to the NW axis, I studied multilayered Co/Cu nanowires with the following relative Co/Cu thickness layers: 25nm/15nm, 25nm/45nm, 50nm/50nm, and 100nm/100nm. Three main remnant configurations were found: (i) antiparallel coupling between Co layers, (ii) mono-domain-like state and (iii) vortex state. In the Co(25 nm)/Cu(15 nm) nanowires, depending on the direction of the saturation field, the Co layers can present either an antiparallel coupling (perpendicular saturation field) or vortex coupling (parallel saturation field) with their core aligned parallel to the wire axis. However, 10% of the nanowires studied present a mono-domain-like state that remains for both parallel and perpendicular saturation fields. In the Co(50 nm)/Cu(50 nm) and Co(25 nm)/Cu(45 nm) nanowires, a larger Cu thickness separating the ferromagnetic layers reduces the magnetic interaction between neighbouring Co layers. The remnant state is hence formed by the combination of monodomain Co layers oriented perpendicularly to the wire axis and some tilted vortex states. Finally for the Co(100 nm)/Cu(100 nm) nanowires a monodomain-like state is found no matters the direction of the saturation field. All these magnetic configurations were determined and simulated using micromagnetic calculations until a quantitative agreement with experimental results has been obtained. I was able to explain the appearance and stability of these configurations according to the main magnetic parameters such as exchange, value and direction of the anisotropy and magnetization. The comparison between simulations and experimental results were used to precisely determine the value of these parameters. In the diameter-modulated cylindrical FeCoCu nanowires, a detailed description of the geometry-induced effect on the local spin configuration was performed. EH experiments seem to reveal that the wires present a remnant single-domain magnetic state with the spins longitudinally aligned. However, we found through micromagnetic simulations that such apparent single-domain state is strongly affected by the local variation of the diameter. The study of the leakage field and the demagnetizing field inside the nanowire highlighted the leading role of magnetic charges in modulated areas. The magnetization presents a more complicated structure than a simple alignment along the wire axis. Finally my results have led to a new interpretation of previous MFM experiments

Gli stili APA, Harvard, Vancouver, ISO e altri

Bridges, Craig Allan Greedan John E. "Structural and electronic properties of BaV10O15, BaV10-xTixO15, and BaVO3-x /". *McMaster only, 2002.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Sans, Aguilar Juan R. "Four dimensional analysis of free electron lasers in the amplifier configuration". Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FSans%5FAguilar.pdf.

Testo completo

Abstract (sommario):

Thesis (M.S. in Applied Science)--Naval Postgraduate School, December 2007.
Thesis Advisor(s): Colson, William B. "December 2007." Description based on title screen as viewed on January 18, 2008. Includes bibliographical references (p. 63). Also available in print.

Gli stili APA, Harvard, Vancouver, ISO e altri

Napier, Stuart A. "Electron correlation and spin-dependent effects in the electron impact excitation of zinc atoms". University of Western Australia. School of Physics, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0098.

Testo completo

Abstract (sommario):

[Truncated abstract] This work investigated electron correlation and spin-dependent effects in electron scattering from zinc for incident electron energies from the lowest excitation threshold at 4.003 eV to 50 eV. Experiments were performed using a crossed-beams electron impact spectrometer, which included an unpolarised electron gun, and also a spin-polarised electron gun. The apparatus was tested, and shown to be operating well, by repeating past studies of electron scattering from helium and argon. Emission cross sections for the 4s4p 3P1, 4s4p 1P1, 4s5s 3S1, 4s4d; 5d; 6d 3D1;2;3 and 4s4d; 5d 1D2 states were measured from the respective thresholds to 50 eV. These were compared with Convergent Close-Coupling (CCC) and B-spline R-matrix (BSRM) calculations of the 4s4p 3P1, 4s4p 1P1, 4s5s 3S1, 4s4d 1D2 and 4s4d 3D1;2;3 emission cross sections. There are serious discrepancies between the theories, and between the theories and experiment, which indicates strong continuum coupling and innershell excitation effects in the electron excitation of zinc. The differential elastic scattering signal at scattering angles of 30 , 54 , 90 and 110 was measured for incident electron energies from just below the lowest excitation threshold at 4.003 eV, to the ionisation threshold at 9.394 eV. Some assignments given by Sullivan et al [1] and Zatsarinny and Bartschat [2] were confirmed by the present experiment. An area of disagreement in the literature concerning the nature of a feature observed at the 4s4p 1P1 threshold at 5.796 eV was resolved in favour of Zatsarinny and Bartschat, who assign the feature as a cusp. ... Below the ionisation threshold, the 4s4p 3P1 photon excitation function supports the assignment of the near-4s4p 1P1 threshold feature as a cusp. Some of the overlapping negative-ion resonances which were observed near 7.5 eV in the 4s4p 3P1, 4s4p 1P1 and 4s5s 3S1 photon excitation functions were assigned with the assistance of the BSRM calculations of Zatsarinny and Bartschat. However, continuum coupling effects above 8 eV seem to cause the theoretical negative-ion resonance predictions to break down. Above the ionisation threshold, the near-11 eV negative-ion resonance effects depend on the configuration n, L and S of the neutral state excitation observed. This may be due to the properties of the mixed negative ion component states. Postcollision interaction (PCI) effects the 4s5s 3S1, 4s4d; 5d; 6d 3D1;2;3 and 4s4d; 5d 1D2 photon excitation functions. The PCI mechanism can populate the 4s4d; 5d; 6d 3D1;2;3 and 4s4d; 5d 1D2 states because the scattered and ejected electrons have a similar energy, and can thus exchange a large amount of orbital angular momentum. The present work demonstrates that electron correlation effects, especially those associated with innershell excitation, are very significant in electron scattering from zinc. Existing theoretical models of electron scattering from zinc inadequately treat electron correlations, and as a result of this are inaccurate, as shown here. The studies presented here should guide the development of models that accurately describe the innershell excitation effects, which are important for zinc and a great many other atoms.

Gli stili APA, Harvard, Vancouver, ISO e altri

Sloggett, Clare Physics Faculty of Science UNSW. "Electron correlations in mesoscopic systems". Awarded by:University of New South Wales. School of Physics, 2007. http://handle.unsw.edu.au/1959.4/31875.

Testo completo

Abstract (sommario):

This thesis deals with electron correlation effects within low-dimensional, mesoscopic systems. We study phenomena within two different types of system in which correlations play an important role. The first involves the spectra and spin structure of small symmetric quantum dots, or "eartificial atoms"e. The second is the "e0.7 structure"e, a well-known but mysterious anomalous conductance plateau which occurs in the conductance profile of a quantum point contact. Artificial atoms are manufactured mesoscopic devices: quantum dots which resemble real atoms in that their symmetry gives them a "eshell structure"e. We examine two-dimensional circular artificial atoms numerically, using restricted and unrestricted Hartree-Fock simulation. We go beyond the mean-field approximation by direct calculation of second-order correlation terms; a method which works well for real atoms but to our knowledge has not been used before for quantum dots. We examine the spectra and spin structure of such dots and find, contrary to previous theoretical mean-field studies, that Hund's rule is not followed. We also find, in agreement with previous numerical studies, that the shell structure is fragile with respect to a simple elliptical deformation. The 0.7 structure appears in the conductance of a quantum point contact. The conductance through a ballistic quantum point contact is quantised in units of 2e^2/h. On the lowest conductance step, an anomalous narrow conductance plateau at about G = 0.7 x 2e^2/h is known to exist, which cannot be explained in the non-interacting picture. Based on suggestive numerical results, we model conductance through the lowest channel of a quantum point contact analytically. The model is based on the screening of the electron-electron interaction outside the QPC, and our observation that the wavefunctions at the Fermi level are peaked within the QPC. We use a kinetic equation approach, with perturbative account of electron-electron backscattering, to demonstrate that these simple features lead to the existence of a 0.7-like structure in the conductance. The behaviour of this structure reproduces experimentally observed features of the 0.7 structure, including the temperature dependence and the behaviour under applied in-plane magnetic fields.

Gli stili APA, Harvard, Vancouver, ISO e altri

吳潔貞 e Kit-ching Betty Ng. "Correlation effects in crystal field splitting". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31230714.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Ng, Kit-ching Betty. "Correlation effects in crystal field splitting /". [Hong Kong : University of Hong Kong], 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12323342.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Temperley, J. "Electron spin resonance studies of early d-transition metal compounds with a d#1#-configuration". Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382736.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Libri sul tema "Electron configuration"

K, Wilson Angela, Peterson Kirk A, American Chemical Society. Division of Physical Chemistry. e American Chemical Society. Division of Computers in Chemistry., a cura di. Electron correlation methodology. Washington, DC: American Chemical Society, 2007.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Göres, Jörn. Correlation effects in 2-dimensional electron systems: Composite fermions and electron liquid crystals. Stuttgart: Max-Planck-Institut für Festkörperforschung, 2004.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

March, Norman H. Electron correlation in molecules and condensed phases. New York: Plenum Press, 1996.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

1945-, Gonis Antonios, Kioussis Nicholas, Ciftan Mikael e International Workshop on Electron Correlations and Materials Properties (1st : 1998 : Crete, Greece), a cura di. Electron correlations and materials properties. New York: Kluwer Academic/Plenum Publishers, 1999.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Matsen, F. A. The unitary group in quantum chemistry. Amsterdam: Elsevier, 1986.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

1950-, Wilson S., a cura di. Electron correlation in atoms and molecules. New York: Plenum Press, 1987.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

H, McGuire J. Electron correlation dynamics in atomic collisions. Cambridge: Cambridge University Press, 1997.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Gordon Godfrey Workshop on Condensed Matter Physics (1991 University of New South Wales). Strongly correlated electron systems: Proceedings of the Gordon Godfrey Workshop on Condensed Matter Physics. Commack, N.Y: Nova Science Publishers, 1992.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Greenspan, Donald. Computer experiments for molecular motions and chemical bonding. Arlington, Tex: University of Texas at Arlington, Dept. of Mathematics, 1995.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Whelan, Colm T. (E,2e) & related processes. Dordrecht: Springer, 1993.

Cerca il testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Capitoli di libri sul tema "Electron configuration"

Davidson, Ernest R. "Configuration Interaction Wave Functions". In Relativistic and Electron Correlation Effects in Molecules and Solids, 105–31. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1340-1_5.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Karwowski, Jacek. "The Configuration Interaction Approach to Electron Correlation". In NATO ASI Series, 65–98. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-7419-4_6.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Handy, Nicholas C. "Full Configuration Interaction and Møller-Plesset Theory". In Relativistic and Electron Correlation Effects in Molecules and Solids, 133–60. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1340-1_6.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pindzola, Michael S., Donald C. Griffin e Christopher Bottcher. "Electron-Ion Collisions in the Average-Configuration Distorted-Wave Approximation". In Atomic Processes in Electron-Ion and Ion-Ion Collisions, 75–91. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-5224-2_3.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Sasaki, F., M. Sekiya, T. Noro, K. Ohtsuki e Y. Osanai. "Non-Relativistic Configuration Interaction Calculations for Many-Electron Atoms: ATOMCI". In Modem Techniques in Computational Chemistry: MOTECC-91, 115–66. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3032-5_3.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Knowles, Peter J. "Electron Correlation in Small Molecules and the Configuration Interaction Method". In Supercomputational Science, 211–33. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-5820-6_17.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Sasaki, F., M. Sekiya, T. Noro, K. Ohtsuki e Y. Osanai. "Non-Relativistic Configuration Interaction Calculations for Many-Electron Atoms: ATOMCI". In Modern Techniques in Computational Chemistry: MOTECC™-90, 181–234. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2219-8_4.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Christoffersen, Ralph E. "Computational Techniques for Many-Electron Systems Using Single Configuration Wavefunctions". In Basic Principles and Techniques of Molecular Quantum Mechanics, 481–575. New York, NY: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-6360-6_11.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pardasani, R. T., e P. Pardasani. "Magnetic properties of monocyclopentadienyl molybdenum(II) complex with 16-electron configuration". In Magnetic Properties of Paramagnetic Compounds, 447–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54228-6_251.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Pardasani, R. T., e P. Pardasani. "Magnetic properties of monocyclopentadienyl molybdenum(II) complex with 16-electron configuration". In Magnetic Properties of Paramagnetic Compounds, 449. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54228-6_252.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Electron configuration"

Williamson, S., e G. Mourou. "Picosecond Electro-Electron Optic Oscilloscope". In Picosecond Electronics and Optoelectronics. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/peo.1985.pdp2.

Testo completo

Abstract (sommario):

The technique of picosecond electro-optic sampling for time-resolving ultrafast electrical transients is presently the only means by which an electrical waveform can be measured with single picosecond resolution. In addition, the electro-optic sampling oscilloscope is capable of millivolt sensitivity and can be used in a contactless configuration, a feature that will enable the rapid characterization of packaged electronic circuits or 2-dimensionai mapping of electric fields. The major drawback of the electro-optic sampling oscilloscope is that it requires a short pulse laser system. The complexity of such a laser system results in a sampling oscilloscope that is delicate, maintenance intensive, and expensive, precluding its development in all but a few large laboratories.

Gli stili APA, Harvard, Vancouver, ISO e altri

McVey, B. D., J. C. Goldstein, K. Lee e B. E. Newnam. "Optical Physics of an XUV Free-Electron Laser*". In Short Wavelength Coherent Radiation: Generation and Applications. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/swcr.1986.tue14.

Testo completo

Abstract (sommario):

The optical physics of an XUV free-electron laser oscillator configuration driven by an RF linac is investigated. Some of the topics discussed are optical beam quality, methods of output coupling, ring resonator configurations, and the expected optical spectrum. The tool used to investigate these physics issues is the computer code, FELEX. FELEX simulates a three-dimensional FEL oscillator configuration. The electron beam is modelled by following individual electron trajectories including deceleration by the light wave, betatron motion, and external focussing due to quadrupole coils. The electron beam parameters used in the simulations are those believed to be scalable from present RF linac experiments. The optical beam is modelled by solving the paraxial wave equation on a square grid. After interaction with the electron beam in the wiggler region, the optical beam is propagated through the resonator cavity to the wiggler entrance where the interaction with a new pulse of electrons is initiated. Initial 3-D simulations at 82nm indicate strong distortions of the optical beam from the idealized Gaussian. Further, multiple pass calculations appear necessary to accurately determine the small signal gain. Finally, the optical spectrum is investigated using a one-dimensional periodic code.

Gli stili APA, Harvard, Vancouver, ISO e altri

Henderson, Gregory N., Thomas K. Gaylord, Elias N. Glytsis, Phillip N. First e William J. Kaiser. "Testing multilayer semiconductor electron wave devices using ballistic electron emission microscopy". In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.thf4.

Testo completo

Abstract (sommario):

Ballistic electron emission microscopy (BEEM) has recently been developed to study the electrical properties of buried interfaces where ballistic electrons are injected into a sample using a scanning tunneling microscope. In this paper, a method is proposed that uses the BEEM technique to observe electron wave optical properties of ballistic transport in semiconductors. This method provides a three-terminal configuration for characterizing electron wave devices that overcomes many of the problems encountered in traditional two- and three-terminal techniques. Specifically, the method provides a highly collimated beam of ballistic carriers with a precisely controlled energy distribution. These carriers probe the quantum transmittance of a voltage- tunable electron wave interference device with minimal impurity scattering. A general procedure is presented for analyzing this experimental configuration based on a combination of the models used to describe BEEM and ballistic electron transport in semiconductors.

Gli stili APA, Harvard, Vancouver, ISO e altri

Raitses, Y., D. Staack, A. Smirnov, A. Litvak, L. Dorf, T. Graves e N. Fisch. "Studies of non-conventional configuration closed electron drift thrusters". In 37th Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-3776.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Hu, E., e S. Laux. "Session 24 Solid state devices—Novel MOS operation and configuration". In 1985 International Electron Devices Meeting. IRE, 1985. http://dx.doi.org/10.1109/iedm.1985.191031.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Dominik, Magdalena, Predrag Mikulic, Wojtek J. Bock e Mateusz Śmietana. "Reflection configuration of long period grating sensor working at dispersion turning point". In Electron Technology Conference ELTE 2016, a cura di Barbara Swatowska, Wojciech Maziarz, Tadeusz Pisarkiewicz e Wojciech Kucewicz. SPIE, 2016. http://dx.doi.org/10.1117/12.2263480.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Shih, C. W., Albert Chin, Chun-Fu Lu e S. H. Yi. "Extremely high mobility ultra-thin metal-oxide with ns2np2 configuration". In 2015 IEEE International Electron Devices Meeting (IEDM). IEEE, 2015. http://dx.doi.org/10.1109/iedm.2015.7409642.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Yang, Rui, Haitong Li, Kirby K. H. Smithe, Taeho R. Kim, Kye Okabe, Eric Pop, Jonathan A. Fan e H. S. Philip Wong. "2D molybdenum disulfide (MoS2) transistors driving RRAMs with 1T1R configuration". In 2017 IEEE International Electron Devices Meeting (IEDM). IEEE, 2017. http://dx.doi.org/10.1109/iedm.2017.8268423.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Kawamura, Leo, Takahiro Ohnishi e Yasuhisa Omura. "Impact of electrode configuration on bio-impedance measurements". In 2013 IEEE International Meeting for Future of Electron Devices, Kansai (IMFEDK). IEEE, 2013. http://dx.doi.org/10.1109/imfedk.2013.6602252.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Capasso, Federico, e M. C. Teich. "Conversion of Poisson photons into sub-Poisson photons by the action of electron feedback". In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.tua7.

Testo completo

Abstract (sommario):

Poisson photons may be converted into sub-Poisson photons by the action of an electron current configured in an external feedback loop. The generation mechanism involves single-photon transitions so that the source can be made arbitrarily sub-Poisson. Unlike previous schemes, nonlinear optics is not invoked. A useful configuration involves a photon emitter illuminating a detector/ source combination in a closed-loop system. Two solid-state implementations of the detector/source are suggested. One makes use of electronic dipole transitions between the energy levels of a quantum-well heterostructure; the other operates by electrons impact-exciting electroluminescent centers.

Gli stili APA, Harvard, Vancouver, ISO e altri

Rapporti di organizzazioni sul tema "Electron configuration"

Y. Raitses, D. Staack, A. Smirnov, A.A. Litvak, L.A. Dorf, T. Graves e and N.J. Fisch. Studies of Non-Conventional Configuration Closed Electron Drift Thrusters. Office of Scientific and Technical Information (OSTI), settembre 2001. http://dx.doi.org/10.2172/788220.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Gu, Xiaofeng, A. Blednykh, M. Blaskiewiscz e S. Verdu-Andres. MBTRACK2 - APPLICATION ON EIC 5GEV ELECTRON RING REVERSE PHASE CONFIGURATION. Office of Scientific and Technical Information (OSTI), gennaio 2024. http://dx.doi.org/10.2172/2281584.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Rej, D. J. Electron temperature measurements of field-reversed configuration plasmas on the FRX-C/LSM experiment. Office of Scientific and Technical Information (OSTI), settembre 1989. http://dx.doi.org/10.2172/5866713.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Alan H. Glasser e Samuel A. Cohen. Electron Acceleration in the Field-reversed Configuration (FRC) by Slowly Rotating Odd-parity Magnetic Fields. Office of Scientific and Technical Information (OSTI), aprile 2001. http://dx.doi.org/10.2172/786570.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Glasser, A. H., e S. A. Cohen. Electron Acceleration in the Field-reversed Configuration (FRC) by Slowly Rotation Odd-parity Magnetic Fields (RMF[subscript o]). Office of Scientific and Technical Information (OSTI), aprile 2001. http://dx.doi.org/10.2172/781483.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Karpius, Peter. Electron Configurations and Basic Chemical Bonding. Office of Scientific and Technical Information (OSTI), ottobre 2020. http://dx.doi.org/10.2172/1679981.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Tang, C. M., P. Sprangle, A. Ting e B. Hafizi. Radio Frequency Linac Driven Free-Electron Laser Configurations. Fort Belvoir, VA: Defense Technical Information Center, settembre 1989. http://dx.doi.org/10.21236/ada212572.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Speller, Leslie C., e Arthur N. Thorpe. Feasibility of Investigating Smith-Purcell Free-Electron Laser Configurations by Electron Energy Loss Studies. Fort Belvoir, VA: Defense Technical Information Center, giugno 1986. http://dx.doi.org/10.21236/ada169059.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Jiang, Yuxiang. Unsettled Technology Areas in Electric Propulsion Systems. SAE International, maggio 2021. http://dx.doi.org/10.4271/epr2021012.

Testo completo

Abstract (sommario):

Electric vehicle (EV) transmission technology—crucial for battery electric vehicles (BEVs) and hybrid electric vehicles (HEVs)—is developing quickly and customers want good performance at a low cost. Single-speed gearboxes are popular in electric drive systems due to their simple and cost-effective configuration. However, multispeed gearboxes are being taken to market due to their higher low-speed torque, dynamic performance, and energy efficiency. Unsettled Technology Areas in Electric Propulsion Systems reviews the economic drivers, existing techniques, and current challenges of EV transmission technology—including torque interruption during shifting; thermal and sealing issues; and noise, vibration, and harshness (NVH). This report discusses the pros and cons for both single-speed and multispeed gearboxes with numerical analysis.

Gli stili APA, Harvard, Vancouver, ISO e altri

Welch, D. R., S. A. Cohen, T. C. Genoni e A. H. Glasser. Formation of Field-reversed-Configuration Plasma with Punctuated-betatron-orbit Electrons. Office of Scientific and Technical Information (OSTI), giugno 2010. http://dx.doi.org/10.2172/984348.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!