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Author: R. H. Pratt Publisher: ISBN: Category : Languages : en Pages : 15
Book Description
Accurate predictions of cross section for the photoeffect can at present only be obtained with numerical methods. Such calculations for the K shell were made by Hulme et.al. for 3 elements and 2 energies and more recently by Hultberg, Nagel, and Olsson (HNO) for a series of energies in 2 heavy elements. Results are presented which have extended these calculations to encompass the range of elements from Z=13 to Z=92 and of energies from 200 keV to 2 MeV, obtaining differential and total cross sections and all polarization correlations between incoming photon and ejected electron. The numerical methods used here are more general than those of previous calculations and will permit inclusion of the screening effects of outer electrons. (Author).
Author: R. H. Pratt Publisher: ISBN: Category : Languages : en Pages : 15
Book Description
Accurate predictions of cross section for the photoeffect can at present only be obtained with numerical methods. Such calculations for the K shell were made by Hulme et.al. for 3 elements and 2 energies and more recently by Hultberg, Nagel, and Olsson (HNO) for a series of energies in 2 heavy elements. Results are presented which have extended these calculations to encompass the range of elements from Z=13 to Z=92 and of energies from 200 keV to 2 MeV, obtaining differential and total cross sections and all polarization correlations between incoming photon and ejected electron. The numerical methods used here are more general than those of previous calculations and will permit inclusion of the screening effects of outer electrons. (Author).
Author: M.Ya. Amusia Publisher: Springer Science & Business Media ISBN: 1475793286 Category : Science Languages : en Pages : 320
Book Description
This book is devoted to the investigation of a rather prevalent process in nature: interaction of atoms with electromagnetic radiation. Primary attention is given to the low and intermediate photon energy region, from tens to hundreds of electron-volts. It is in this region that the probability of photon absorption and photoionization is largest. Data in this energy region are very interesting and useful in astrophysics and plasma physics, solid-state physics and quantum electronics, and in a number of other branches of science and technical applications. Formulae for hydrogen atom photoionization are given in almost all textbooks on quantum mechanics. Together with the limited amounts of experimental data available up to the beginning of the sixties, the formulae gave an impression of the completeness of the study of photoionization, of the absolute clarity of the mechanism of the process, and of the possibility of calculating rather easily its probability using the formulae.
Author: Miron Ya. Amusia Publisher: Springer Nature ISBN: 3030851435 Category : Science Languages : en Pages : 464
Book Description
This book presents numerical methods for solving a wide range of problems associated with the structure of atoms and simplest molecules, and their interaction with electromagnetic radiation, electrons, and other particles. It introduces the ATOM-M software package, presenting a unified software suite, written in Fortran, for carrying out precise atomic and molecular numeric calculations. The book shows how to apply these numerical methods to obtain many different characteristics of atoms, molecules, and the various processes within which they interact. In an entirely self-sufficient approach, it teaches the reader how to use the codes provided to build atomic and molecular systems from the ground up and obtain the resulting one-electron wave functions. The computational programs presented and made available in this book allow calculations in the one-electron Hartree–Fock approximation and take into account many-electron correlations within the framework of the random-phase approximation with exchange or many-body perturbation theory. Ideal for scholars interested in numerical computation of atomic and molecular processes, the material presented in this book is useful to both experts and novices, theorists, and experimentalists.
Author: Miron Amusia Publisher: Springer Science & Business Media ISBN: 3642247520 Category : Science Languages : en Pages : 806
Book Description
The aim of this book is to present highly accurate and extensive theoretical Atomic data and to give a survey of selected calculational methods for atomic physics, used to obtain these data. The book presents the results of calculations of cross sections and probabilities of a broad variety of atomic processes with participation of photons and electrons, namely on photoabsorption, electron scattering and accompanying effects. Included are data for photoabsorption and electron scattering cross-sections and probabilities of vacancy decay formed for a large number of atoms and ions. Attention is also given to photoionization and vacancy decay in endohedrals and to positron-atom scattering. The book is richly illustrated. The methods used are one-electron Hartree-Fock and the technique of Feynman diagrams that permits to include many-electron correlations. This is done in the frames of the Random Phase approximation with exchange and the many-body perturbation theory. Newly obtained and previously collected atomic data are presented. The atomic data are useful for investigating the electronic structure and physical processes in solids and liquids, molecules and clusters, astronomical objects, solar and planet atmospheres and atomic nucleus. Deep understanding of chemical reactions and processes is reached by deep and accurate knowledge of atomic structure and processes with participation of atoms. This book is useful for theorists performing research in different domains of contemporary physics, chemistry and biology, technologists working on production of new materials and for experimentalists performing research in the field of photon and electron interaction with atoms, molecules, solid bodies and liquids.
Author: R. H. Pratt
Author: R. H. Pratt
Author: M.Ya. Amusia
Author: Alan J. Bearden
Author: Miron Ya. Amusia
Author: 
Author: 
Author: Ronald Dean Schmickley
Author: Miron Amusia
Author: United States. Air Force. Office of Aerospace Research
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