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Добірка наукової літератури з теми "Light nuclei spectrum"

Автор: Grafiati

Опубліковано: 11 березня 2023

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Статті в журналах з теми "Light nuclei spectrum"

VARY, JAMES P., PIETER MARIS, and ANDREY SHIROKOV. "AB INITIO NO CORE METHODS: APPLICATIONS TO LIGHT NUCLEI." International Journal of Modern Physics E 17, supp01 (December 2008): 109–21. http://dx.doi.org/10.1142/s0218301308011793.

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We introduce a no-core full configuration (NCFC) approach and present results for 4 He , 12 C , 14 F and some other nuclei with the realistic NN interaction, JISP16. We obtain ground state energies and their uncertainties through exponential extrapolations that we demonstrate are reliable in 4 He where fully converged results are obtained. We find 12 C is overbound by 1.7 MeV and we predict the yet-to-be-measured binding energy of 14 F to be 70.2±3.5 MeV. The extrapolated spectrum of 14 F is in reasonable agreement with known features of the 14 B spectrum. Distinctions are drawn between this approach and the no-core shell model (NCSM).

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Morigaki, Kazuo. "Light-induced defect creation processes and light-induced defects in hydrogenated amorphous silicon." European Physical Journal Applied Physics 90, no. 2 (May 2020): 20101. http://dx.doi.org/10.1051/epjap/2020190257.

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We have proposed a model of light-induced defect creation processes and light-induced defects. Recently, important results using pulsed electron-nuclear double resonance (ENDOR) by Fehr et al. [M. Fehr, A. Schnegg, C. Teutloff, R. Bittl, O. Astakhov, F. Finger, B. Rech, K. Lips, Phys. Status Solidi A 207, 552 (2010)] have been reported, so that these results are interpreted on the basis of our model. Fehr et al. have observed ENDOR signals due to hydrogen nuclei distributed around a dangling bond. The ENDOR spectra due to hydrogen nuclei being located with distance of r from the dangling bond have been calculated, taking into accounts the dipolar interaction, and also the Fermi-type contact hyperfine interaction for the H-related dangling bond (HDB) that is a dangling bond having hydrogen at a nearby site. The typical features of the observed ENDOR spectra are that the spectrum has a shoulder at the low frequency side from the natural NMR frequency of hydrogen and it has a dip in the central part. The calculated ENDOR spectrum of HDB exhibits such a shoulder. This is consistent with our model of light-induced defects such as HDB. The ENDOR spectra with various values of r are calculated. In this paper, we also deal with the distant ENDOR precisely, using the theory of distant ENDOR by Lambe et al. [J. Lambe, N. Laurance, K.C. McIrvine, R.W. Terhune, Phys. Rev. 122, 1161 (1961)]. The calculated distant ENDOR spectrum shows a dip in the central part. Concerning the dip, Fehr et al. attribute the dip to be due to the suppression of the matrix ENDOR line (this is called the artifact). Thus, it is not obvious whether the dip is due to such an artifact or the central part of the distant ENDOR spectrum.

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Kalmykov, N. N., G. V. Kulikov, V. P. Sulakov, Yu A. Fomin, and V. N. Kalmykov. "On the energy spectrum of light nuclei in primary cosmic rays." Bulletin of the Russian Academy of Sciences: Physics 73, no. 5 (May 2009): 558–60. http://dx.doi.org/10.3103/s1062873809050074.

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Qinghua Wang, 王清华, 李振华 Zhenhua Li, 来建成 Jiancheng Lai, and 贺安之 Anzhi He. "Fourier analysis of elastic light scattering spectrum of epithelial cell nuclei." Chinese Optics Letters 8, no. 3 (2010): 278–81. http://dx.doi.org/10.3788/col20100803.0278.

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Mazur, I. A., A. M. Shirokov, A. I. Mazur, I. J. Shin, Y. Kim, P. Maris, and J. P. Vary. "Description of Continuum Spectrum States of Light Nuclei in the Shell Model." Physics of Particles and Nuclei 50, no. 5 (September 2019): 537–43. http://dx.doi.org/10.1134/s1063779619050186.

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Pahlavani, M. R., and R. Morad. "Application of AdS/CFT in Nuclear Physics." Advances in High Energy Physics 2014 (2014): 1–19. http://dx.doi.org/10.1155/2014/863268.

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Анотація:

We review some recent progress in studying the nuclear physics especially nucleon-nucleon (NN) force within the gauge-gravity duality, in context of noncritical string theory. Our main focus is on the holographic QCD model based on the AdS6background. We explain the noncritical holography model and obtain the vector-meson spectrum and pion decay constant. Also, we study the NN interaction in this frame and calculate the nucleonmeson coupling constants. A further topic covered is a toy model for calculating the light nuclei potential. In particular, we calculate the light nuclei binding energies and also excited energies of some available excited states. We compare our results with the results of other nuclear models and also with the experimental data. Moreover, we describe some other issues which are studied using the gauge-gravity duality.

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VAAGEN, J. S., B. V. DANILIN, and S. N. ERSHOV. "CONTINUUM SPECTROSCOPY OF HALO NUCLEI." International Journal of Modern Physics E 16, no. 04 (May 2007): 1033–45. http://dx.doi.org/10.1142/s0218301307006484.

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Halo nuclei represent a new type of structure found in extremely neutron rich light nuclei, at the limits of nuclear existence. Of particular interest are Borromean nuclei, where none of the binary substructures can bind. Similar structures, Efimov states, have now also been produced in traps in molecular physics. Nuclear physics has in recent years taken further steps to also explore the nature of the halo continuum, in fact the major part of the spectrum since halo nuclei support only one or a few bound states. Since 3 → 3 scattering is prohibitively difficult to perform, the halo continuum has so far been excited in binary collisions, proceeding via the exotic ground state which to various degrees puts its imprint on the result. Below we discuss via examples how to disentangle continuum structures, comparing with recent correlation data. The work involves a consistent treatment of halo structure and reaction theory, and emphasizes the important future role of exclusive observables and complete experiments.

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Kalmykov, N. N., V. N. Kalmykov, G. V. Kulikov, P. V. Sulakov, and Yu A. Fomin. "The light nuclei energy spectrum of primary cosmic rays using EAS MSU array data." Moscow University Physics Bulletin 63, no. 6 (December 2008): 425–27. http://dx.doi.org/10.3103/s0027134908060143.

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Wills, Beverley J., D. Wills, N. J. Evans, A. Natta, K. L. Thompson, M. Breger, M. L. Sitko, D. F. Lester, D. R. Garnett, and S. R. Sawyer. "Polarization of IRAS Quasars and the Inner Structure of Active Galactic Nuclei." Symposium - International Astronomical Union 134 (1989): 325–26. http://dx.doi.org/10.1017/s0074180900141221.

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We have found that 4 new, bright IRAS quasars, out of 7 observed, have strong, non-variable, wavelength-dependent polarization. Three show degrees of polarization, pλ, increasing from infrared to UV wavelengths (Fig. 1), which implies a combination of a polarized, scattered spectrum and a much redder, unpolarized spectrum. Detailed IR and optical polarimetry and spectrophotometry of one, IRAS 13349+2438 (Wills et al.), shows a polarized flux spectrum, pλxFλ, (continuum and Pa α, Hα, and Hβ broad hydrogen lines) typical of unreddened, luminous quasars. This suggests that the path of scattered light from a central, luminous quasar is low in dust and that the polarization of the scattered spectrum is wavelength independent. The latter is most easily explained by electron scattering although the data do not exclude dust scattering. When this polarized flux spectrum is subtracted from the total spectrum, we are left with a very reddened line and continuum spectrum, E(B-V) = 0.3 to 0.7, which we attribute to the same luminous quasar seen through a thick dusty torus. The angle of polarization is parallel to the major axis of the r-band image, presumed to be that of the host galaxy. If the torus is in the plane of the galaxy, the axial ratio suggests a viewing angle of 40° to the plane of the torus. Fig. 2 illustrates the geometry. The appearance of the quasar at optical and UV wavelengths will depend strongly on viewing angle, suggesting that present samples of quasars selected by colours, optical flux density, or quasi-stellar appearance, may be seriously biased, with important consequences for studies of the space density and evolution of AGN.

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BELYAEVA, T. L., and N. S. ZELENSKAYA. "Computation of Nuclear Reactions with Light-Heavy Ions." International Journal of Modern Physics C 02, no. 01 (March 1991): 238–42. http://dx.doi.org/10.1142/s012918319100024x.

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The computer code OLYMPS for calculation of the inclusive cross sections for nuclear reactions induced by light heavy ions on medium-mass nuclei at beam energies of 10–20 MeV per nucleon is developed. Our calculations are based on the description of the massive transfer reactions in the spectator model. In view of the fact that most of the considered reactions have more than two particles in the final state and require an allowance for the continuum spectrum, the standard distorted wave Born approximation (DWBA) code fails to work. In our method the transition amplitude is witten in a prior-form of exact finite range DWBA and an exact numerical integration over the transfer momentum is carried out. This requires knowledge of the optical potentials between interacting light and heavy ions in a wide energy range. In addition, OLYMPS provides for the alternative ways of calculation of the wave functions of the relative motion of the heavy ions.

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Більше джерел

Дисертації з теми "Light nuclei spectrum"

WANG, ZHAOMIN. "Measurements of Cosmic Ray Proton + Helium flux with the DAMPE experiment." Doctoral thesis, Gran Sasso Science Institute, 2020. http://hdl.handle.net/20.500.12571/9942.

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This thesis concentrates on the measurement of cosmic-ray light component (proton + helium) spectrum with the Dark Matter Particle Explorer (DAMPE). In chapter one, an introduction on cosmic-ray history is given together with the acceleration mechanism and some recent experiments. A description on DAMPE system is presented in chapter two, which includes its sub-detectors, scientific targets and parameters. There are various challenges in measuring cosmic ray energy with a limited-size calorimeter (like the BGO of DAMPE). In chapter three, various unfolding methods for reconstructing the primary energy of cosmic ray nuclei are discussed. It turns out that the method based on the Bayes theorem has the best performance on reconstructing the cosmic-ray energy for DAMPE. The test results show that the Bayes method is capable of reconstructing nuclei energy with good accuracy on both MC samples (bias within 2%) and real data that come from the test beams at CERN (bias within 3%). In chapter four, a detailed description on the measurement of cosmic ray protons + helium spectrum is presented, which involves the candidates selection, energy reconstruction and calculation of the statistical and systematic uncertainties. Finally, the proton + helium spectrum with energy 40 GeV to 100 TeV is presented.

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Whitfield, Melinda D. "Doppler-Broadening of Light Nuclei Gamma-Ray Spectra." TopSCHOLAR®, 2010. http://digitalcommons.wku.edu/theses/1075.

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Non-destructive methods of material interrogation are used to locate hidden explosives and thwart terrorism attempts. In one such method materials are bombarded with neutrons which react with the nuclei of the atoms within causing a de-excitation process emitting a gamma-ray. The spectrum displayed by the collection of these gamma-rays gives valuable information regarding the material’s elemental make-up. It has been hypothesized that gamma-rays from neutron-induced gamma-ray reactions on light elements with atomic numbers less than 20, including most of the gamma-rays of interest in explosives detection, are Doppler-broadened. This thesis focuses on the gamma ray spectra from the 4438 keV gamma ray in the 12C (n, n’γ) reaction wherein Doppler broadening was investigated. A graphite sample was exposed to 14 MeV neutrons and the 12C gamma ray spectra collected using an HPGe detector positioned at four different angles with respect to the neutron beam; near 00, 450, 900 and 1350. No other experimental parameter was changed. The resultant gamma ray spectra indicated Doppler broadening had occurred.

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Hengstebeck, Thomas. "Measurement of the energy spectrum of the BL Lac object PG1553+113 with the MAGIC telescope in 2005 and 2006." Doctoral thesis, [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985223839.

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Bark, Robert Arthur. "Shape coexistence and particle alignments in light osmium and rhenium nuclei." Phd thesis, 1990. http://hdl.handle.net/1885/138528.

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Lestone, J. P. "Light charged particle production in heavy-ion induced fusion-fission reactions." Phd thesis, 1990. http://hdl.handle.net/1885/139014.

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Bowkett, Glenn Christopher. "Nd:YVO4 microchip lasers and amplifiers." Thesis, 1999. https://vuir.vu.edu.au/15570/.

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An investigation of microchip laser and amplifier systems using the material Neodymium doped Yttrium orthovanadate (Nd:YV04) has been performed. This project takes advantage of recent improvements in the growth of Nd:YV04 to investigate its potential as a compact and simple single longitudinal mode laser. Such lasers (termed microchip lasers) have important applications in laser seeding, communications and frequency doubled micro-laser systems. The material has also been investigated as a compact optical amplifier.

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Книги з теми "Light nuclei spectrum"

International School of Quantum Optics and Spectroscopy (18th 1990 Gdańsk-Sobieszewo, Poland). Quantum optics and spectroscopy: Proceedings of the 18-th International School of Quantum Optics and Spectroscopy, Gdańsk-Sobieszewo, 3-8 September 1990. Commack, N.Y: Nova Science Publishers, 1993.

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George, Birnbaum, ed. Phenomena induced by intermolecular interactions. New York: Plenum Press, 1985.

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United States. National Aeronautics and Space Administration., ed. International AGN watch: Continuous monitoring of NGC 4151. [Washington, DC: National Aeronautics and Space Administration, 1995.

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The physical and chemical basis of molecular biology. [U.K.?]: Helvetian Press, 2010.

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Fiutak, J., and J. Mizerski. Quantum Optics and Spectroscopy: Proceedings of the 18-Th International School of Quantum Optics and Spectroscopy Gdansk-Sobieszewo, 3-8 September 1. Nova Science Publishers, 1993.

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Частини книг з теми "Light nuclei spectrum"

Davoudi, Zohreh. "Light Nuclei from Lattice QCD: Spectrum, Structure and Reactions." In Recent Progress in Few-Body Physics, 597–606. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32357-8_95.

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Locher, M. P., and B. S. Zou. "The $$ \bar{p}n\to m\pi $$ Amplitude Subthreshold from Proton Spectra of $$ \bar{p}d\to m\pi p$$ at Rest." In Mesons and Light Nuclei, 225–29. Vienna: Springer Vienna, 1992. http://dx.doi.org/10.1007/978-3-7091-7617-7_28.

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Zav’yalov, N. V., V. I. In’kov, M. S. Dudorov, E. N. Donskoj, M. V. Savin, M. K. Saraeva, and Yu A. Khokhlov. "Measurements of Bremsstrahlung Spectra from 50 MeV Electrons on Ta and Photoneutrons Energy Distribution from Light, Medium and Heavy Nuclei." In Nuclear Data for Science and Technology, 452–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-58113-7_128.

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Ostlie, Dale A. "Modern Physics: New Science to Study the Universe." In Astronomy: The Human Quest for Understanding, 263–306. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780198825821.003.0008.

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Abstract Modern Physics: New Science to Study the Universe shows that what may initially appear to be minor discrepancies with standard theories of the universe can lead to paradigm-shattering scientific revolutions. Einstein’s simple thought experiments exposed logical inconsistencies in Maxwell’s electromagnetic theory of light, and of the fundamental nature of space and time. These thought experiments led to Einstein’s development of his relativity theory and four-dimensional spacetime. The theory of special relativity is considered in this chapter. Explaining the spectrum of blackbody radiation became an intractable problem for the science of the 1800s. The solution led to quantum mechanics, a new understanding of the nature of atoms, and the discrete and probabilistic nature of the universe. The discovery that atomic nuclei are composed of protons and neutrons led to the realization that atoms of elements can have multiple isotopes, differing in the numbers of neutrons.

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Matti Linnanto, Juha. "Electronic Structure of Chlorophyll Monomers and Oligomers." In Chlorophylls [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104089.

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This chapter deals with the electronic structure of chlorophyll molecules and their complexes. Different theoretical and quantum chemical calculation methods are used to study the molecular and electronic structure of chlorophylls. Studied spectral region covers ultraviolet and infrared spectral regions, containing blue side of the Soret band, as also traditional Qy band region. Thus, there are not only focusing on the traditional Qy, Qx, and Soret transitions of chlorophylls but also high-energy transitions (in this region also proteins and nuclei acids absorb light). The aim is to show the effect of molecular conformation on the electronic states and thus on the absorption and emission spectra of monomers and oligomers. In chlorophyll-protein complexes, such conformation effect finetuning the spectral transitions and increases overlap between donor and acceptor states of energy transfer processes. Also, the role of vibronic transition in the shape of absorption and emission spectra of the studied systems will be considered.

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WAGENBRUNN, R. F., M. RADICI, and S. BOFFI. "ELECTROMAGNETIC PROPERTIES OF LIGHT NUCLEON RESONANCES IN A CHIRAL CONSTITUENT QUARK MODEL." In Quark Confinement and the Hadron Spectrum IV, 306–8. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812778567_0038.

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"Dictyostelium Discoideum: Live Cell Imaging in Changing Perspective." In Protocols used in Molecular Biology, edited by Abhishek Singh, 126–45. BENTHAM SCIENCE PUBLISHERS, 2020. http://dx.doi.org/10.2174/9789811439315120010016.

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The advent of advanced microscopes; during microscope evolution from simple microscopes to confocal and live cell microscope; having digital imaging facility revolutionized our view for the living cells. In the protein localization study, fluorescent proteins are tagged at amino or carboxyl (preferably) terminal of desired protein for live cell study. These live cell studies improved our understanding of protein dynamics and understanding its role in biological regulation. The mutational variants of fluorescent tags (GFP, RFP); can be used with different protein; which will efficiently use UV-Visible to Far Red light spectrum; without overlapping of excitation and emission spectrum. Further, various cell organelle (Lysosome, Golgi bodies, Endoplasmic Reticulum, Mitochondria, Nucleus) trackers; improved our live cell localization studies in the wide non-overlapping UV-Visible spectrum.This chapter gives an overview for live cell protein localization study in mitotically active, unicellular stage of Dictyostelium discoideum. This evolutionary cutting edge organism had both unicellular as well as multicellular stages during its life cycle. This chapter will provide the design of fusion of fluorescent tag to the specific gene and its live cell localization. Further, it will cover; transformation of the unicellular organism; drug based selection; sample preparation with nuclear, mitochondrial localization markers (trackers) and live cell localization study on live cell-confocal microscope setup. It will also have a glimpse of the design of fusion protein with an aspect of advantage and disadvantages.

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Cina, Jeffrey A. "Short-pulse electronic absorption." In Getting Started on Time-Resolved Molecular Spectroscopy, 1–10. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780199590315.003.0001.

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Linear absorption, by a molecule, of pulsed laser light is detailed using time-dependent perturbation theory. Pulse propagators, which describe the transfer and shaping of nuclear wave packets during laser-driven electronic transitions are introduced. The equivalence, in the long-pulse limit, to Heller’s description of linear absorption in terms of wave-packet dynamics is established. The effects of initial thermal equilibrium, spectral congestion, and finite spectral resolution are illustrated with signal calculations on model Hamiltonians.

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"Taking Inspiration from Astronomy for Visual and Verbal Projects." In Advances in Multimedia and Interactive Technologies, 135–69. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4627-8.ch007.

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The chapter comprises projects about some basic concepts related to astrophysics presented in a visual, verbal, or both ways, for example in the form of comics. The reader is encouraged to envision particular events, processes, and products, and then transform the concepts into another level of understanding. Projects involve visualizing or describing the relationship between frequency, wavelength, and energy, and the energy of light as the electromagnetic wave. Themes for projects include the solar system, Kepler’s explanation of the forces acting on the solar system’s motion and planetary movement, creating frames for animation about the expansion of the universe, a travel to the sun’s center to explore nuclear fusion, examination of light and electromagnetic spectrum, elementary particles and quantum mechanics, and visualizing and designing one’s own household and its objects and appliances.

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Mee, Nicholas. "Twinkle, Twinkle Little Star." In The Cosmic Mystery Tour, 46–53. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198831860.003.0007.

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The emission and absorption of light by atoms produces discrete sets of spectral lines that were a vital clue to unravelling the structure of atoms and their elucidation was an important step towards the development of quantum mechanics. In the middle years of the nineteenth century Bunsen and Kirchhoff discovered that spectral lines can be used to determine the chemical composition of stars. Following Rutherford’s discovery of the nucleus, Bohr devised a model of the hydrogen atom that explained the spectral lines that it produces. His work was developed further by Pauli, who postulated the exclusion principle in order to explain the structure of other types of atom. This enabled him to explain the layout of the Periodic Table and the chemical properties of the elements.

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Тези доповідей конференцій з теми "Light nuclei spectrum"

Mereghetti, Emanuele. "EDMs of the nucleon and light nuclei in Chiral Effective Theory." In Xth Quark Confinement and the Hadron Spectrum. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.171.0239.

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"(Multi-)strange hadron and light (anti-)nuclei production with ALICE at the LHC." In XITH CONFERENCE ON QUARK CONFINEMENT AND HADRON SPECTRUM. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4938698.

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Li, Ning, Serdar Elhatisari, Evgeny Epelbaum, Dean Lee, Bing-Nan Lu, and Ulf-G. Meißner. "The new lattice action and spectrum of the light andmedium-mass nuclei." In The 36th Annual International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.334.0056.

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Li, Ning, Serdar Elhatisari, Evgeny Epelbaum, Dean Lee, Bing-Nan Lu, and Ulf-G. Meißner. "NN interaction and the spectrum of light and medium-mass nuclei using Lattice Effective Field Theory." In The 9th International workshop on Chiral Dynamics. Trieste, Italy: Sissa Medialab, 2020. http://dx.doi.org/10.22323/1.317.0099.

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Cui, Zhiqiang. "Energy Calibration of Scintillator Detectors in Different Neutron Diagnostic System on Tokamak." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81190.

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The purpose of tokamak plasma diagnostics is to provide the necessary parameters for device protection, operation, and maintenance. It can also supply parameters for fusion physics research. As one of the main ways to diagnose nuclear fusion plasma, neutron diagnosis focuses on the detection of neutrons, produced by the D-D and D-T fusion reactions, to obtain the physical information of internal plasma. Neutron measurements are widely performed on tokamak to provide the essential information on the neutron yield rate of the plasma that is related to fusion power. Since neutron has no electric charge, neutron can’t be ionized directly by the interaction of electrons in the detection material. The interactions between neutron and nuclei, such as nuclear reaction and nuclear recoil, are used to detect neutrons. According to the front sensitive materials, neutron detectors can be divided into gas detectors, scintillator detectors, semiconductor detectors, ionization chambers and so on. Since the magnetic field surrounding Tokamak can have a magnificent influence on the performance of photo-electronic multiplier tubes (PMTs), it is necessary to employ magnetic shielding in designing detectors, thus guaranteeing the proper operation of detectors within a strong magnetic field. Although the PMTs are equipped with magnetic shielding materials by manufacturers, they can only resist the influence of geomagnetic field. Besides the magnetic shielding and neutron/gamma shielding, neutron detectors should be calibrated before used on the tokamak. Nine similar detectors were assembled and calibrated in this paper. The basic idea of processing calibration data is that we should adjust the resolution and the light response function in order to make experiment spectrum and simulation spectrum fit on the recoil proton edge. A special explication is given to the data processing of neutron calibration, followed by an analysis of its resulting light response function and by comparison with PTB’s results.

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Speed, Jonathon. "Demystifying chemometrics: how multivariate analysis allows spectroscopy to be used to solve most analytical problems." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/pkrn4677.

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Chemists have been using spectroscopic techniques for decades if not hundreds of years. The large range of different physical transitions nuclei and molecules can undertake when irradiate with specific wavelengths of light means that almost every property of interest can and has been studied by spectroscopic means. However, the need to interpret the raw spectra means only specialists are able to interpret the fundamental information present in a spectrum, turning spectroscopy into a tool for experts. The advent of chemometrics meant that spectrometers could be changed into concentration meters, allowing a user to run a previously built calibration curve and understand the makeup of their sample. As a result, many industries now have a dwindling pool of spectroscopy “power users” and have retired their powerful instruments into pre-determined QC tests. This presentation aims to educate and empower the attendees as to the power of spectroscopy, and the different types of analysis it allows, ranging from fundamental chemical makeup through to on-line and real-time processing analysis for industrial installations. We will briefly outline the different types of spectroscopy commonly used in laboratories and on-line, and explain their strengths and weaknesses. Next, we will explain the fundamentals behind multivariate analysis, focusing on principal component analysis (PCA) and partial least squares (PLS) methodology as well as multivariate curve resolution (MCR). We will then explain how chemometrics can be used to investigate in detail what is occurring during a process, how the advanced statistics generated on every spectrum allow in depth analysis of the process (for example how to properly use Hotelling’s T2 and Q Residuals) and give some case studies.

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Fodor, Z., and Marvin L. Marshak. "Light hadron spectrum from lattice QCD." In 10TH CONFERENCE ON THE INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS. AIP, 2009. http://dx.doi.org/10.1063/1.3293838.

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Amos, K., L. Canton, G. Pisent, J. P. Svenne, and S. Karataglidis. "The spectra of exotic light mass nuclei determined with MCAS theory." In International Conference on Nuclear Data for Science and Technology. Les Ulis, France: EDP Sciences, 2007. http://dx.doi.org/10.1051/ndata:07101.

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Bayar, M., K. Azizi та M. T. Zeyrek. "Σ[sub b,c] to Nucleon Transitions in Light Cone QCD Sum Rules". У THE IX INTERNATIONAL CONFERENCE ON QUARK CONFINEMENT AND THE HADRON SPECTRUM—QCHS IX. AIP, 2011. http://dx.doi.org/10.1063/1.3575036.

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Bicudo, Pedro, N. Cardoso, and Marco Cardoso. "The chiral crossover, static-light and light-light meson spectra, and the deconfinement crossover." In XLIX International Winter Meeting on Nuclear Physics. Trieste, Italy: Sissa Medialab, 2011. http://dx.doi.org/10.22323/1.135.0062.

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Звіти організацій з теми "Light nuclei spectrum"

Zilberman, Mark. “Doppler de-boosting” and the observation of “Standard candles” in cosmology. Intellectual Archive, July 2021. http://dx.doi.org/10.32370/iaj.2549.

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“Doppler boosting” is a well-known relativistic effect that alters the apparent luminosity of approaching radiation sources. “Doppler de-boosting” is the name of relativistic effect observed for receding light sources (e.g. relativistic jets of active galactic nuclei and gamma-ray bursts). “Doppler boosting” changes the apparent luminosity of approaching light sources to appear brighter, while “Doppler de-boosting” causes the apparent luminosity of receding light sources to appear fainter. While “Doppler de-boosting” has been successfully accounted for and observed in relativistic jets of AGN, it was ignored in the establishment of Standard candles for cosmological distances. A Standard candle adjustment of an Z>0.1 is necessary for “Doppler de-boosting”, otherwise we would incorrectly assume that Standard Candles appear dimmer not because of “Doppler de-boosting” but because of the excessive distance, which would affect the entire Standard Candles ladder at cosmological distances. The ratio between apparent (L) and intrinsic (Lo) luminosities as a function of the redshift Z and spectral index α is given by the formula ℳ(Z) = L/Lo=(Z+1)α -3 and for Type Ia supernova appears as ℳ(Z) = L/Lo=(Z+1)-2. “Doppler de-boosting” may also explain the anomalously low luminosity of objects with a high Z without the introduction of an accelerated expansion of the Universe and Dark Energy.

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Zilberman, Mark. PREPRINT. “Doppler de-boosting” and the observation of “Standard candles” in cosmology. Intellectual Archive, June 2021. http://dx.doi.org/10.32370/ia_2021_06_23.

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PREPRINT. “Doppler boosting” is a well-known relativistic effect that alters the apparent luminosity of approaching radiation sources. “Doppler de-boosting” is the term of the same relativistic effect observed for receding light sources (e.g.relativistic jets of active galactic nuclei and gamma-ray bursts). “Doppler boosting” alters the apparent luminosity of approaching light sources to appear brighter, while “Doppler de-boosting” alters the apparent luminosity of receding light sources to appear fainter. While “Doppler de-boosting” has been successfully accounted for and observed in relativistic jets of AGN, it was ignored in the establishment of Standard candles for cosmological distances. A Standard candle adjustment of Z>0.1 is necessary for “Doppler de-boosting”, otherwise we would incorrectly assume that Standard Candles appear dimmer, not because of “Doppler de-boosting” but because of the excessive distance, which would affect the entire Standard Candles ladder at cosmological distances. The ratio between apparent (L) and intrinsic (Lo) luminosities as a function of the redshift Z and spectral index α is given by the formula ℳ(Z) =L/Lo=(Z+1)^(α-3) and for Type Ia supernova appears as ℳ(Z)=L/Lo=(Z+1)^(-2). “Doppler de-boosting” may also explain the anomalously low luminosity of objects with a high Z without the introduction of an accelerated expansion of the Universe and Dark Energy.

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