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Saturday, July 25, 2020 | History

2 edition of Variational methods applied to the inelastic scattering of electrons. found in the catalog.

Variational methods applied to the inelastic scattering of electrons.

Noel Marshall King

Variational methods applied to the inelastic scattering of electrons.

by Noel Marshall King

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  • 14 Currently reading

Published .
Written in English


Edition Notes

Thesis (M. Sc.)--The Queen"s University of Belfast, 1953.

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL19421227M

I am particularly interested in electron and positron scattering, both elastic and inelastic, and I endeavour to calculate cross sections for a wide range of targets. Such cross sections are essential to understanding how matter behaves in a wide range of environments, be they natural (e.g., the Earth’s atmosphere, or astrophysical plasmas. The excitation cross sections of the 2S state of atomic hydrogen at 10 low incident electron energies ( and eV) have been calculated using the variational polarized method. Nine partial waves are used to get convergence of cross sections in the above energy range. The maximum of the cross section is π a 0 2 at eV which is close to the experimental result ± π Cited by: 2.

  The second paper presents a general review of quantum Monte Carlo methods used in the present book. One of the most challenging problems in the field of quantum Monte Carlo techniques, the negative-sign problem, is also discussed and new methods proposed to partially overcome it. In addition, low-dimensional quantum spin systems are studied. Effective interactions and the scattering length Scattering length for a model potential Scattering between different internal states Inelastic processes Elastic scattering and Feshbach resonances Determination of scattering lengths Scattering lengths for alkali atoms and hydrogen

Raman Scattering Inelastic X-Ray Scattering Photoemission Measurement of Work Functions Angle-Resolved Photoemission Core-Level Photoemission and Charge-Transfer Insulators Problems References VI MAGNETISM 24 Classical Theories of Magnetism and Ordering Moreover, this method provides a very compact and self-consistent way of taking into account the damping effects and finite lifetimes of quasi-particles due to inelastic collisions. In addition, it correctly defines the Generalized Mean Field (GMF), that determine elastic scattering renormalizations and, in general, are not functionals of the Alma mater: Moscow State University.


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Variational methods applied to the inelastic scattering of electrons by Noel Marshall King Download PDF EPUB FB2

Variational methods in electron-atom scattering theory. New York: Plenum Press, © (DLC) (OCoLC) Material Type: Document, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: R K Nesbet. ISBN: OCLC Number: Description: x, pages: graphs ; 24 cm: Contents: 1.

Quantum Mechanics of Electron-Atom Scattering.- ABSTRACT. A survey has been made of the experimental data for the cross sections and fission parameters of the fissile nuclides: UUand Pu for the Neutron Physics Symposium at Rensselaer Polytechnic Institute, MayThe best available data have been used to construct the most probable behavior of the low energy cross sections which are presented graphically.

The Schwinger variational principle is applied to s-wave electron-hydrogen atom scattering. Computationally, consistent with a recent paper by Apagyi et al. The variational method of Hulthen has been applied to the elastic scattering of slow electrons by helium atoms, the effect of exchange being taken into account in calculating the zero-order phase.

@article{osti_, title = {Cross sections for electron scattering by carbon disulfide in the low- and intermediate-energy range}, author = {Brescansin, L M and Iga, I and Lee, M -T and Machado, L E and Michelin, S E}, abstractNote = {In this work, we report a theoretical study on e{sup -}-CS{sub 2} collisions in the low- and intermediate-energy ranges.

Physica 48 () North-Holland Publishing Co. INELASTIC SCATTERING OF HIGH-ENERGY ELECTRONS BY HELIUM R. VANDERPOORTEN # Physique Thrique et Mathatique, UniversitLibre de Bruxelles, Bruxelles, Belgique Received 14 November Synopsis Generalized oscillator strengths and Born cross sections are calculated for electron excitation of the ground state to the n 1S (n = 1, Cited by: 4.

Takatsuka, K. and McKoy, V. () Theory of electronically inelastic scattering of electrons by molecules, Phys. Rev. A 30, – ADS CrossRef Google ScholarCited by: 2.

The variational method is applied to the monoenergetic time dependent transport equation to obtain a simple relation for the asymptotic decay constant in small pulsed assemblies. The results indicate that flat trial functions may be a reasonable representation of the flux distributions in the thin slab limit.

Thírumalai and D. Truhlar, Comparison of convergence of the Schwinger, optimized anomaly-free, and optimized minimum norm variational methods for potential scattering, Chem. Phys. Lett. () and erratum in press; Google ScholarCited by: 6. Approximation methods Basic foundations of atomic, molecular, and solid state physics Basic elements of quantum field theory Scattering theory Relativistic quantum mechanics Although these topics underpin a variety of subject areas from high energy, quantum condensed matter, and ultracold atomic physics toFile Size: KB.

The applications of quantum mechanics are many and various, and vast swathes of modern physics fall under this rubric. Here we tell only a few of the possible stories, laying the groundwork for future exploration.

There are two major topics. Much of these lectures is devoted to condensed matter physics or, more precisely, solid state Size: 2MB. electron-molecule scattering, incorporating complex boundary conditions, is reported in chapter 1 of this book by Rescigno et al.

4 An offshoot of the Hulth_n-Kohn variational method is the variational R-matrix method, s' _ In chapter 8 of this book Schneider r presents a general discussion of the R-matrix method, including the variational R. Molecular Dynamics and Hybrid Monte Carlo Algorithms for the Variational Path Integral with a Fourth-Order Propagator Shinichi Miura Chap DOI: /bkch Publication Date (Web): February 6, electron-molecule scattering, incorporating complex boundary conditions, is reported in chapter 1 of this book by Rescigno et al.* An offshoot of the Hulth6n-Kohn variational method is the variational R-matrix method, s' 6 In chapter 8 of this book Schneider 7 presents a general discussion of the R-matrix method, including the variational R-matrix.

Full text of "Variational principles in the collision theory" See other formats. The opening of new inelastic scattering channels, as the bias matches the energies of various phonon modes in the wire, also leads to a suppression of the electronic conductance, since, starting from ideal transmission, the conductance can only go down, and the inelastic I–V features take the form of.

The study of the electronic structure of materials is at a momentous stage, with the emergence of new computational methods and theoretical approaches.

This volume provides an introduction to the field and describes its conceptual framework, the capabilities of present. Excitation probabilities of helium and variational applications to electron scattering problems Saul Altshuler A dissertation presented to the faculty of the Graduate School of the University of Southern California in partial fulfillment of the requirements for the degree of Doctor of Philosophy.

These phonons are rather energetic, being of the order of 30 to 50 meV (or more) in energy, and lead to inelastic scattering processes, since there is a significant gain or loss of energy by the carrier during the scattering process.

The importance of the inelastic scattering processes is quite clear, since the above were essentially elastic. Description; Chapters; Reviews; Supplementary; Julian Schwinger (–) was one of the giants of 20th Century science.

He contributed to a broad range of topics in theoretical physics, ranging from classical electrodynamics to quantum mechanics, from nuclear physics through quantum electrodynamics to the general theory of quantum fields."State-to-State Cross Sections for Elastic and Inelastic Electron Scattering by N 2 at eV, Including Resonant Enhancement of Vibrational Excitation," K.

Onda and D. G. Truhlar, Journal of Chemical Phys (). "Improved Canonical Variational Theory for .The Monte Carlo method for electron transport is a semiclassical Monte Carlo(MC) approach of modeling semiconductor transport. Assuming the carrier motion consists of free flights interrupted by scattering mechanisms, a computer is utilized to simulate the trajectories of particles as they move across the device under the influence of an electric field using classical mechanics.