Log in

Relevant bibliographies by topics / Neutron scattering theories / Journal articles

To see the other types of publications on this topic, follow the link: Neutron scattering theories.

Journal articles on the topic 'Neutron scattering theories'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 40 journal articles for your research on the topic 'Neutron scattering theories.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Mansuripur, Masud. "A Tutorial on the Classical Theories of Electromagnetic Scattering and Diffraction." Nanophotonics 10, no. 1 (2020): 315–42. http://dx.doi.org/10.1515/nanoph-2020-0348.

Full text

Abstract:

AbstractStarting with Maxwell’s equations, we derive the fundamental results of the Huygens-Fresnel-Kirchhoff and Rayleigh-Sommerfeld theories of scalar diffraction and scattering. These results are then extended to cover the case of vector electromagnetic fields. The famous Sommerfeld solution to the problem of diffraction from a perfectly conducting half-plane is elaborated. Far-field scattering of plane waves from obstacles is treated in some detail, and the well-known optical cross-section theorem, which relates the scattering cross-section of an obstacle to its forward scattering amplitud

APA, Harvard, Vancouver, ISO, and other styles

2

DE BLASIO, F. V., and G. LAZZARI. "NUCLEAR EFFECTS ON SUPERFLUID NEUTRON STAR MATTER." Modern Physics Letters A 13, no. 17 (1998): 1383–92. http://dx.doi.org/10.1142/s0217732398001443.

Full text

Abstract:

In the inner crust of a neutron star, the superfluid neutron liquid shares a fraction of the volume with neutron-rich nuclei and thus cannot be considered as uniform. We find that quasi-resonant states, due to elastic scattering with the effective nuclear potential wells, can enhance the neutron density of states at the Fermi surface for some values of the energy of the incident neutron. This may locally change the pairing energy gap of the superfluid neutrons up to a factor of three to four. We then discuss the smoother change of the neutron effective matrix element induced by the presence of

APA, Harvard, Vancouver, ISO, and other styles

3

Bénard, Pierre, Liang Chen, and A. M. S. Tremblay. "Neutron-scattering measurements as a test of theories of high-temperature superconductivity." Physical Review B 47, no. 1 (1993): 589–92. http://dx.doi.org/10.1103/physrevb.47.589.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Armstrong, Clare L., Laura Toppozini, Hannah Dies, Antonio Faraone, Michihiro Nagao, and Maikel C. Rheinstädter. "Incoherent Neutron Spin-Echo Spectroscopy as an Option to Study Long-Range Lipid Diffusion." ISRN Biophysics 2013 (March 31, 2013): 1–9. http://dx.doi.org/10.1155/2013/439758.

Full text

Abstract:

Diffusion is the fundamental mechanism for lipids and other molecules to move in a membrane. It is an important process to consider in modelling the formation of membrane structures, such as rafts. Lipid diffusion is mainly studied by two different techniques: incoherent neutron scattering and fluorescence microscopy. Both techniques access distinctly different length scales. While neutron scattering measures diffusion over about 3 lipid diameters, microscopic techniques access motions of lipids over micrometer distances. The diffusion constants which are determined by these two methods often

APA, Harvard, Vancouver, ISO, and other styles

5

Innerlohinger, Josef, Mario Villa, Matthias Baron, and Otto Glatter. "Ultra-small-angle neutron scattering from dense micrometre-sized colloidal systems: data evaluation and comparison with static light scattering." Journal of Applied Crystallography 39, no. 2 (2006): 202–8. http://dx.doi.org/10.1107/s0021889806001592.

Full text

Abstract:

Ultra-small-angle neutron scattering (USANS) probes the sameqregime as static light scattering (LS), making USANS an additional tool for the study of structures between 100 nm and 10 µm. Dense oil-in-water emulsions, which have already been characterized intensively by light scattering, are investigated in this study as a model system using USANS. The two basic problems of such scattering studies are the following: on the one hand, one has to use different scattering theories for USANS and LS, and on the other hand, in both cases one has to deal not only with particle interactions but also wit

APA, Harvard, Vancouver, ISO, and other styles

6

DOSTER, W. "THE GLASS TRANSITION ANOMALIES OF MYOGLOBIN IN THE LIGHT OF MODE COUPLING THEORY." Modern Physics Letters B 05, no. 21 (1991): 1407–14. http://dx.doi.org/10.1142/s0217984991001702.

Full text

Abstract:

The physics and some predictions of recent mode coupling theories concerning the liquid to glass instability are reviewed with the scope to explore its potential to explain the dynamics of non-simple liquids. It is proposed that the dynamics scaling behaviour observed in the neutron scattering spectra of myoglobin reveal a critical temperature which is associated with the arrest of density fluctuations.

APA, Harvard, Vancouver, ISO, and other styles

7

Papoulias, D. K., and T. S. Kosmas. "Probing electromagnetic neutrino properties within the tensor non-standard neutrino-nucleus interactions." HNPS Proceedings 23 (March 8, 2019): 119. http://dx.doi.org/10.12681/hnps.1915.

Full text

Abstract:

Non-standard coherent neutrino scattering off nuclei is extensively studied through realistic nuclear structure calculations performed within the framework of the quasi-particle random phase approximation (QRPA). More specifically, we focus on the accurate estimation of the number of events expected to be measured by the COHERENT experiment at the Spallation Neutron Source at Oak Ridge, as well as by the reactor neutrino experiments TEXONO and GEMMA. To this purpose our study concentrates on the relevant detector materials 20 Ne, 40 Ar, 76 Ge and 132 Xe. In this context, we obtain stringent co

APA, Harvard, Vancouver, ISO, and other styles

8

Henning, Greg, Antoine Bacquias, Catalin Borcea та ін. "MEASUREMENT OF 182,184,186W (N, N’ γ) CROSS SECTIONS AND WHAT WE CAN LEARN FROM IT". EPJ Web of Conferences 247 (2021): 09003. http://dx.doi.org/10.1051/epjconf/202124709003.

Full text

Abstract:

Today’s development of nuclear installations rely on numerical simulation for which the main input are evaluated nuclear data. Inelastic neutron scattering (n, xn) is a reaction of importance because it modifies the neutron population, the neutron energy distribution and may create new isotopes. The study of this reaction on tungsten isotopes is interesting because it is a common structural material. Additionally, tungsten isotopes are a good testing field for theories. The IPHC group started an experimental program with the GRAPhEME setup installed at the neutron beam facility GELINA to measu

APA, Harvard, Vancouver, ISO, and other styles

9

RANA, ANWAR MANZOOR, and M. IQBAL ANSARI. "PARTICLE COARSENING IN Fe(Cu) ALLOYS." Modern Physics Letters B 09, no. 06 (1995): 343–50. http://dx.doi.org/10.1142/s0217984995000322.

Full text

Abstract:

Particle coarsening behavior in Fe(Cu) alloys has been studied by electrical resistivity measurements at different ageing temperatures. Measured resistivity data for these alloys were analyzed by discussing the electrical resistivity behavior during thermal ageing and theories of diffusion-controlled coarsening of precipitates. Some important parameters such as the precipitate radius r, solute concentration C, diffusivity D, etc. were calculated and compared with the previous results obtained with Transmission Electron Microscopy (TEM) and Small Angle Neutron Scattering (SANS) techniques.

APA, Harvard, Vancouver, ISO, and other styles

10

Bramwell, Steven T. "Generalized longitudinal susceptibility for magnetic monopoles in spin ice." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1981 (2012): 5738–66. http://dx.doi.org/10.1098/rsta.2011.0596.

Full text

Abstract:

The generalized longitudinal susceptibility χ (q, ω ) affords a sensitive measure of the spatial and temporal correlations of magnetic monopoles in spin ice. Starting with the monopole model, a mean field expression for χ (q, ω ) is derived as well as expressions for the mean square longitudinal field and induction at a point. Monopole motion is shown to be strongly correlated, and both spatial and temporal correlations are controlled by the dimensionless monopole density x which defines the ratio of the magnetization relaxation rate and the monopole hop rate. Thermal effects and spin-lattice

APA, Harvard, Vancouver, ISO, and other styles

11

Lynn, J. E., I. Tews, S. Gandolfi, and A. Lovato. "Quantum Monte Carlo Methods in Nuclear Physics: Recent Advances." Annual Review of Nuclear and Particle Science 69, no. 1 (2019): 279–305. http://dx.doi.org/10.1146/annurev-nucl-101918-023600.

Full text

Abstract:

In recent years, the combination of precise quantum Monte Carlo (QMC) methods with realistic nuclear interactions and consistent electroweak currents, in particular those constructed within effective field theories (EFTs), has led to new insights in light and medium-mass nuclei, neutron matter, and electroweak reactions. For example, with the same chiral interactions, QMC calculations can reproduce binding energies and radii for light nuclei, n–α scattering phase shifts, and the neutron matter equation of state. This compelling new body of work has been made possible both by advances in QMC me

APA, Harvard, Vancouver, ISO, and other styles

12

Kerscher, Michael, Frederik Lipfert, and Henrich Frielinghaus. "Exploring Hidden Local Ordering in Microemulsions with a Weak Directive Second Order Parameter." Chemistry Africa 3, no. 3 (2020): 703–9. http://dx.doi.org/10.1007/s42250-020-00126-7.

Full text

Abstract:

Abstract So far, the near-surface ordering of microemulsions was focused on lamellar ordering while the bulk microemulsion was bicontinuous. In a series of different non-ionic surfactants the near-surface ordering of microemulsions at a hydrophilic silicon surface was studied using grazing incidence small angle neutron scattering. For the surfactant C8E3, most likely a gyroid structure was found at the solid–liquid interface, while the more efficient surfactants find lamellar ordering up to lamellar capillary condensation. The ranges for near-surface ordering are deeper than the bulk correlati

APA, Harvard, Vancouver, ISO, and other styles

13

Kunz, Werner, and Pierre Turq. "Structure and Dynamics of Nonaqueous Electrolyte Solutions by Small Angle Neutron Scattering, Brownian Dynamics and Primitive Model Theories." Berichte der Bunsengesellschaft für physikalische Chemie 94, no. 3 (1990): 321–25. http://dx.doi.org/10.1002/bbpc.19900940324.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Li, Bao-An, and Lie-Wen Chen. "Neutron–proton effective mass splitting in neutron-rich matter and its impacts on nuclear reactions." Modern Physics Letters A 30, no. 13 (2015): 1530010. http://dx.doi.org/10.1142/s0217732315300104.

Full text

Abstract:

The neutron–proton effective mass splitting in neutron-rich nucleonic matter reflects the spacetime nonlocality of the isovector nuclear interaction. It affects the neutron/proton ratio during the earlier evolution of the Universe, cooling of proto-neutron stars, structure of rare isotopes and dynamics of heavy-ion collisions. While there is still no consensus on whether the neutron–proton effective mass splitting is negative, zero or positive and how it depends on the density as well as the isospin-asymmetry of the medium, significant progress has been made in recent years in addressing these

APA, Harvard, Vancouver, ISO, and other styles

15

Radaelli, Paolo G., and James D. Jorgensen. "Neutron Diffraction from Novel Materials." MRS Bulletin 24, no. 12 (1999): 24–28. http://dx.doi.org/10.1557/s0883769400053689.

Full text

Abstract:

The discovery and development of new materials is the foundation of the science and technology “food chains.” Examples of new materials with novel properties that have stimulated new scientific questions and/or led to new technologies include liquid crystals, advanced batteries, structural ceramics, dielectrics, ferroelectrics, catalysts, high-temperature superconductors, har dmagnets, and magnetoresistive devices. Establishing the crystal structure of a newly discovered Compound is a mandatory first step, but the most important contribution of diffraction techniques is to provide an understan

APA, Harvard, Vancouver, ISO, and other styles

16

Bartsch, E., F. Fujara, M. Kiebel, H. Sillescu, and W. Petry. "Inelastic Neutron Scattering Experiments on Van der Waals Glasses - A Test of Recent Microscopic Theories of the Glass Transition." Berichte der Bunsengesellschaft für physikalische Chemie 93, no. 11 (1989): 1252–59. http://dx.doi.org/10.1002/bbpc.19890931121.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Bykovetz, N., A. Hoser, J. Klein, C. L. Lin, and M. S. Seehra. "Neutron scattering measurements in RbMnF3: A test of spin-wave-region theories at low temperatures and critical behavior near TN." Journal of Applied Physics 111, no. 7 (2012): 07E145. http://dx.doi.org/10.1063/1.3679410.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Goldman, Maurice. "Anatole Abragam. 15 December 1914 — 8 June 2011." Biographical Memoirs of Fellows of the Royal Society 63 (January 2017): 7–21. http://dx.doi.org/10.1098/rsbm.2017.0026.

Full text

Abstract:

Anatole Abragam, a French physicist of Russian origin, made a profound and lasting impact on the field of magnetic resonance, both electronic and nuclear, through his discoveries, contributions and his eminent educational role. In nuclear magnetic resonance (NMR) especially, he brought to the field theoretical rigour and clarity. Many of the most distinguished scientists in the field consider themselves to be his students, and he is known by many as a ‘giant of magnetic resonance’. Among his main contributions are: theories of the spin Hamiltonian and of core polarization in electron paramagne

APA, Harvard, Vancouver, ISO, and other styles

19

Han, Zehua, Guisheng Jiao, Changli Ma, Taisen Zuo, Charles C. Han, and He Cheng. "The Relationship between Free Volume and Cooperative Rearrangement: From the Temperature-Dependent Neutron Total Scattering Experiment of Polystyrene." Polymers 13, no. 18 (2021): 3042. http://dx.doi.org/10.3390/polym13183042.

Full text

Abstract:

Although many theories have been proposed to describe the nature of glass formation, its microscopic picture is still missing. Here, by a combination of neutron scattering and molecular dynamics simulation, we present the temperature-dependent atomic structure variation of polystyrene at the glass formation, free volume and cooperative rearrangement. When it is close to glass formation, the polymer is confined in tubes, whose diameter is the main chain–main chain distance, in a “static cage” from its neighbors. This definition can not only account for the kinetic pathway dependence of Williams

APA, Harvard, Vancouver, ISO, and other styles

20

DJAJAPUTRA, DAVID, and JOHN RUVALDS. "SUSCEPTIBILITY AND VERTEX CORRECTIONS FOR A SQUARE FERMI SURFACE." International Journal of Modern Physics B 13, no. 01 (1999): 25–48. http://dx.doi.org/10.1142/s0217979299000035.

Full text

Abstract:

We investigate the response of an electron system which exhibits ideal nesting features. Using the standard Matsubara formalism we derive analytic expressions for the imaginary and real parts of the bare particle–hole susceptibility. The imaginary part has sharp peaks whose maxima at the nesting momenta approximately scale with (ω/T). The peak lineshapes resemble neutron scattering data on chromium and some copper oxide superconductors. The real part of the bare susceptibility at the nesting vectors diverges logarithmically at low temperatures. Analytic formulas for the first vertex correction

APA, Harvard, Vancouver, ISO, and other styles

21

Takagi, R., J. S. White, S. Hayami, et al. "Multiple-q noncollinear magnetism in an itinerant hexagonal magnet." Science Advances 4, no. 11 (2018): eaau3402. http://dx.doi.org/10.1126/sciadv.aau3402.

Full text

Abstract:

Multiple-q spin order, i.e., a spin texture characterized by a multiple number of coexisting magnetic modulation vectors q, has recently attracted attention as a source of nontrivial magnetic topology and associated emergent phenomena. One typical example is the triple-q skyrmion lattice state stabilized by Dzyaloshinskii-Moriya interactions in noncentrosymmetric magnets, while the emergence of various multiple-q states of different origins is expected according to the latest theories. Here, we investigated the magnetic structure of the itinerant polar hexagonal magnet Y3Co8Sn4, in which sever

APA, Harvard, Vancouver, ISO, and other styles

22

Huberman, T., D. A. Tennant, R. A. Cowley, R. Coldea, and C. D. Frost. "A study of the quantum classical crossover in the spin dynamics of the 2DS= 5/2 antiferromagnet Rb2MnF4: neutron scattering, computer simulations and analytic theories." Journal of Statistical Mechanics: Theory and Experiment 2008, no. 05 (2008): P05017. http://dx.doi.org/10.1088/1742-5468/2008/05/p05017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Almásy, László, and Attila Bende. "Intermolecular Interaction in Methylene Halide (CH2F2, CH2Cl2, CH2Br2 and CH2I2) Dimers." Molecules 24, no. 9 (2019): 1810. http://dx.doi.org/10.3390/molecules24091810.

Full text

Abstract:

The intermolecular interaction in difluoromethane, dichloromethane, dibromomethane, and diiodomethane dimers has been investigated using high level quantum chemical methods. The potential energy curve of intermolecular interaction along the C⋯C bond distance obtained using the coupled-cluster theory with singles, doubles, and perturbative triples excitations CCSD(T) were compared with values given by the same method, but applying the local (LCCSD(T)) and the explicitly correlated (CCSD(T)-F12) approximations. The accuracy of other theoretical methods—Hartree–Fock (HF), second order Møller–Ples

APA, Harvard, Vancouver, ISO, and other styles

24

Kramer, M., I. H. Stairs, V. Venkatraman Krishnan, et al. "The relativistic binary programme on MeerKAT: science objectives and first results." Monthly Notices of the Royal Astronomical Society 504, no. 2 (2021): 2094–114. http://dx.doi.org/10.1093/mnras/stab375.

Full text

Abstract:

ABSTRACT We describe the ongoing Relativistic Binary programme (RelBin), a part of the MeerTime large survey project with the MeerKAT radio telescope. RelBin is primarily focused on observations of relativistic effects in binary pulsars to enable measurements of neutron star masses and tests of theories of gravity. We selected 25 pulsars as an initial high priority list of targets based on their characteristics and observational history with other telescopes. In this paper, we provide an outline of the programme, and present polarization calibrated pulse profiles for all selected pulsars as a

APA, Harvard, Vancouver, ISO, and other styles

25

Gvaramia, Manuchar, Gaetano Mangiapia, Vitaliy Pipich, et al. "Tunable viscosity modification with diluted particles: when particles decrease the viscosity of complex fluids." Colloid and Polymer Science 297, no. 11-12 (2019): 1507–17. http://dx.doi.org/10.1007/s00396-019-04567-6.

Full text

Abstract:

Abstract While spherical particles are the most studied viscosity modifiers, they are well known only to increase viscosities, in particular at low concentrations of approx. 1%. Extended studies and theories on non-spherical particles in simple fluids find a more complicated behavior, but still a steady increase with increasing concentration. Involving platelets in combination with complex fluids—in our case, a bicontinuous microemulsion—displays an even more complex scenario that we analyze experimentally and theoretically as a function of platelet diameter using small angle neutron scatterin

APA, Harvard, Vancouver, ISO, and other styles

26

Li, Boyu, Joey Kim, and Julie Kornfield. "A Molecular Picture for the Thermo-Reversibility of Gels Formed by Isophthalic Acid-Ended Telechelic Polymers." MRS Proceedings 1794 (2015): 9–14. http://dx.doi.org/10.1557/opl.2015.638.

Full text

Abstract:

ABSTRACTWe demonstrate that isophthalic acid-ended telechelic poly(1,5-cyclooctadiene)s (A-PCODs) form thermo-reversible gels in non-polar solvent with a unique molecular mechanism for their thermo-reversibility. Like other associative telechelic polymers, A-PCODs form “flower-like” micelles at low concentration and form gels through bridging at higher concentration which exhibit linear viscoelasticity. However, unlike the widely studied hydrophobically end-capped PEOs, A-PCODs show clear thermo-reversibility in viscosity and dynamic modulus around 30 °C due to the hydrogen-bonding end groups.

APA, Harvard, Vancouver, ISO, and other styles

27

CHHABRA, TARANJEET, and P. RAM BABU. "LIMITING LEPTONIC GAUGE BOSON COUPLING FROM NEUTRINO-ELECTRON SCATTERING." International Journal of Modern Physics A 09, no. 30 (1994): 5409–14. http://dx.doi.org/10.1142/s0217751x9400217x.

Full text

Abstract:

The phenomenological consequences of the leptonic gauge boson (X-), predicted in certain unified theories, are pointed out. The new boson’s contribution in electronic neutrino-electron scattering is calculated. Combining the data on Z decay, electronic neutrino-electron scattering etc., we obtain the region of allowed coupling strengths of X-. The analysis is model-independent but assumes V, A Lorentz structure and μ-e universality.

APA, Harvard, Vancouver, ISO, and other styles

28

ADAMS, T., P. BATRA, L. BUGEL, et al. "TERASCALE PHYSICS OPPORTUNITIES AT A HIGH STATISTICS, HIGH ENERGY NEUTRINO SCATTERING EXPERIMENT: NuSOnG." International Journal of Modern Physics A 24, no. 04 (2009): 671–717. http://dx.doi.org/10.1142/s0217751x09043316.

Full text

Abstract:

This paper presents the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering on Glass). This experiment uses a Tevatron-based neutrino beam to obtain over an order of magnitude higher statistics than presently available for the purely weak processes νμ + e- → νμ + e- and νμ + e- → νe + μ-. A sample of Deep Inelastic Scattering events which is over two orders of magnitude larger than past samples will also be obtained. As a result, NuSOnG will be unique among present and planned experiments for its ability to probe neutrino coupli

APA, Harvard, Vancouver, ISO, and other styles

29

Batool, Sidra, Mehwish Nisar, Fabio Mangini, Fabrizio Frezza, and Eugenio Fazio. "Scattering of Light from the Systemic Circulatory System." Diagnostics 10, no. 12 (2020): 1026. http://dx.doi.org/10.3390/diagnostics10121026.

Full text

Abstract:

There are many factors of methodological origin that influence the measurement of optical properties of the entire circulatory system which consists of blood as the basic component. The basic idea of this review article is to provide the optical properties of the circulatory system with all those factors of influence that have been employed in biomedical optics for different applications. We begin with the available optical properties, i.e., absorption, scattering and, reduced scattering coefficient, in general for any tissue inside the human body and prominent scattering theories (e.g., light

APA, Harvard, Vancouver, ISO, and other styles

30

JOHNSON, GLENN ERIC. "INTERACTING QUANTUM FIELDS." Reviews in Mathematical Physics 11, no. 07 (1999): 881–928. http://dx.doi.org/10.1142/s0129055x99000271.

Full text

Abstract:

A wide class of quantum field theories (QFTs) describing interacting neutral scalar bosons are constructed. It is shown that a redefinition of the vacuum expectation values (VEV) of quantum fields as generalized functions leads to constructions of interacting fields that are operators in a Hilbert space and satisfy the physical requirements for a field theory. The field operators are constructed directly, without perturbation expansion, and constructed in spacetime of any number of dimensions. The corresponding scattering theory is developed. The limited function class underlying the QFT impos

APA, Harvard, Vancouver, ISO, and other styles

31

BASEILHAC, P., and V. A. FATEEV. "FERMION–BOSON DUALITY IN INTEGRABLE QUANTUM FIELD THEORY." Modern Physics Letters A 13, no. 35 (1998): 2807–18. http://dx.doi.org/10.1142/s0217732398002989.

Full text

Abstract:

We introduce and study one-parameter family of integrable quantum field theories. This family has a Lagrangian description in terms of massive Thirring fermions ψ, ψ† and charged bosons χ, [Formula: see text] of complex sinh–Gordon model coupled with BCn affine Toda theory. Perturbative calculations, analysis of the factorized scattering theory and the Bethe ansatz technique are applied to show that under duality transformation, which relates weak and strong coupling regimes of the theory, the fermions ψ, ψ† transform to bosons and χ, [Formula: see text] and vice versa. The scattering amplitud

APA, Harvard, Vancouver, ISO, and other styles

32

Garat, Alcides. "Tetrads in low-energy weak interactions." International Journal of Modern Physics A 33, no. 33 (2018): 1850197. http://dx.doi.org/10.1142/s0217751x1850197x.

Full text

Abstract:

Tetrads are introduced in order to study the relationship between tetrad gauge states of space–time and particle interactions, specially in weak processes at low energy. Through several examples like inverse muon decay, elastic neutrino–electron scattering, it is explicitly shown how to assign to each vertex of the corresponding low-order Feynman diagram in a weak interaction, a particular set of tetrad vectors. The relationship between the tetrads associated to different vertices is exhibited explicitly to be generated by a SU(2) local tetrad gauge transformation. We are establishing a direct

APA, Harvard, Vancouver, ISO, and other styles

33

Danylevsky, V. "Cosmic rays and aerosols in the terrestrial atmosphere." Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 57 (2018): 15–27. http://dx.doi.org/10.17721/btsnua.2018.57.15-27.

Full text

Abstract:

Galactic cosmic rays are considered as one of the external force influencing the Earth’s climate change. The cosmic rays are the main cause of the troposphere ionization. Ions are considered as one of the factors that participates in producing of the aerosol particles and cloud condensation nuclei, when the super saturation level of the water vapor or/and other atmosphere constituents vapor is sufficient. Aerosols are present throughout the atmosphere and affect Earth’s climate directly through backscattering of sunlight and indirectly by altering cloud properties. Both effects are known with

APA, Harvard, Vancouver, ISO, and other styles

34

Borkowski, Mateusz, Alexei A. Buchachenko, Roman Ciuryło, et al. "Weakly bound molecules as sensors of new gravitylike forces." Scientific Reports 9, no. 1 (2019). http://dx.doi.org/10.1038/s41598-019-51346-y.

Full text

Abstract:

Abstract Several extensions to the Standard Model of particle physics, including light dark matter candidates and unification theories predict deviations from Newton’s law of gravitation. For macroscopic distances, the inverse-square law of gravitation is well confirmed by astrophysical observations and laboratory experiments. At micrometer and shorter length scales, however, even the state-of-the-art constraints on deviations from gravitational interaction, whether provided by neutron scattering or precise measurements of forces between macroscopic bodies, are currently many orders of magnitu

APA, Harvard, Vancouver, ISO, and other styles

35

Nakatani, Alan I., Hongdoo Kim, and Charles C. Han. "Shear Induced Phase Behavior of Polymer Blends by Small Angle Neutron Scattering." MRS Proceedings 166 (1989). http://dx.doi.org/10.1557/proc-166-479.

Full text

Abstract:

ABSTRACTThe phase behavior of polymer blends and solutions can be changed dramatically by a flow field using a variety of flow geometries. Unlike simple binary fluids which require extremely high shear rates to produce only small shifts in the phase boundary, polymer phase behavior may be influenced by as much as 10 degrees with the application of much lower shear rates. However, there is a large body of conflicting data concerning the nature of these shear effects in polymers.Here we report on the effects of shear on the phase behavior of polymer blends by small angle neutron scattering (SANS

APA, Harvard, Vancouver, ISO, and other styles

36

Sarte, P. M., K. Cruz-Kan, B. R. Ortiz, et al. "Dynamical ground state in the XY pyrochlore Yb2GaSbO7." npj Quantum Materials 6, no. 1 (2021). http://dx.doi.org/10.1038/s41535-021-00343-4.

Full text

Abstract:

AbstractThe magnetic ground state of the pyrochlore Yb2GaSbO7 has not been established. The persistent spin fluctuations observed by muon spin-relaxation measurements at low temperatures have not been adequately explained for this material using existing theories for quantum magnetism. Here we report on the synthesis and characterisation of Yb2GaSbO7 to revisit the nature of the magnetic ground state. Through DC and AC magnetic susceptibility, heat capacity, and neutron scattering experiments, we observe evidence for a dynamical ground state that makes Yb2GaSbO7 a promising candidate for disor

APA, Harvard, Vancouver, ISO, and other styles

37

Ullman, Robert. "Polymer Chain Deformation in Stretched and Swollen Elastomers." MRS Proceedings 79 (1986). http://dx.doi.org/10.1557/proc-79-225.

Full text

Abstract:

AbstractIn the early theories of rubber elasticity, the retractive force and change in free energy of a stretched specimen were calculated from the deformation of the polymer chains of which the rubber network was formed. The mean chain deformation was presumed to be the same as that of the macroscopic specimen, an assumption which seemed reasonable, but could not be confirmed experimentally. Small angle neutron scattering (SANS) made measurement of chain dimensions possible, and it was soon discovered [1], [2] that the actual relation between dimensional changes of the polymer chain and defor

APA, Harvard, Vancouver, ISO, and other styles

38

Kampmann, R., H. Eckerlebe, and R. Wagner. "Precipitation Kinetics in Metastable Solid Solutions – Theoretical Considerations and Application to Cu-Ti Alloys." MRS Proceedings 57 (1985). http://dx.doi.org/10.1557/proc-57-525.

Full text

Abstract:

AbstractCu-2.9 at.% Ti single crystals were homogenized at various temperatures (780 °C ≤ TH ≤ 960°C) and quenched. Subsequent isothermal aging at 350 °C led to phase separation, the kinetics of which have been followed by employing small-angle neutron scattering (SANS). According to comple-mentary transmission electron and analytical field ion microscopy studies, the resulting transformation products of this first order phase transition are stoichiometrically ordered ellipsoidal Cu4Ti particles, the aspect ratio of which changes with aging time (t) as revealed by two-dimensional SANS-detectio

APA, Harvard, Vancouver, ISO, and other styles

39

Rollet, A. L., M. Jardat, J. F. Dufrêche, P. Turq, and D. Canet. "Transport Properties in Ionic Media." MRS Proceedings 651 (2000). http://dx.doi.org/10.1557/proc-651-t9.5.1.

Full text

Abstract:

AbstractTransportcoe[ ]cients in charged media exhibit strong variations, according to the conditions of displacement of the particles. Electrical transport, characterized by the simultaneous displacement of positive and negative charges in opposite directions obeys Ohm's law, but its variation with concentration (non-ideality), depends on several types of interactions, whose time of establishment varies from picosecond to nanosecond. Several diffusion processes can occur: mutual diffusion, where ions move simultaneously in the same direction, keeping local elec- troneutrality, and self diffus

APA, Harvard, Vancouver, ISO, and other styles

40

Bell, Nicole F., James B. Dent, Jayden L. Newstead, Subir Sabharwal, and Thomas J. Weiler. "Migdal effect and photon bremsstrahlung in effective field theories of dark matter direct detection and coherent elastic neutrino-nucleus scattering." Physical Review D 101, no. 1 (2020). http://dx.doi.org/10.1103/physrevd.101.015012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!