This book brings together a comprehensive theoretical and experimental survey of the current understanding of the basic physical processes involved in atomic processes.

Author: Tu-nan Chang

Publisher: World Scientific

ISBN: 9810208774

Category: Science

Page: 408

View: 693

Detailed discussions on many of the recent advances in the many-body theory of atomic structure are presented by the leading experts around the world on their respective specialized approaches. Emphasis is given to the photoionization dominated by the resonance structures, which reveals the effect of the multi-electron interaction in atomic transitions involving highly correlated atomic systems. Recent experimental developments, stimulated by the more advanced applications of intense lasers and short wavelength synchrotron radiation, are also reviewed. This book brings together a comprehensive theoretical and experimental survey of the current understanding of the basic physical processes involved in atomic processes.

... manybody theory of atomic structure by leading theorists on their respective specialized approaches. Emphasis is given to the photoionization dominated ...

Author: T-N Chang

Publisher: World Scientific

ISBN: 9789814505772

Category: Science

Page: 420

View: 818

Detailed discussions on many of the recent advances in the many-body theory of atomic structure are presented by the leading experts around the world on their respective specialized approaches. Emphasis is given to the photoionization dominated by the resonance structures, which reveals the effect of the multi-electron interaction in atomic transitions involving highly correlated atomic systems. Recent experimental developments, stimulated by the more advanced applications of intense lasers and short wavelength synchrotron radiation, are also reviewed. This book brings together a comprehensive theoretical and experimental survey of the current understanding of the basic physical processes involved in atomic processes. Contents:Recent Many-Body Perturbation Calculations of Photoionization Cross Sections (H P Kelly)Relativistic Many-Body Theory Applied to Highly-Charged Ions (W R Johnson)R-Matrix Theory of Atomic and Molecular Processes (P G Burke)Precision Configuration-Interaction Calculation for Atomic Systems with an 1s2-Core (K T Chung)Hyperspherical Coordinate Description of Single- and Multiphoton Processes in Two-Electron Systems (A F Starace)Non-Variational Multiconfiguration Hartree-Fock Calculations for Continuum Wave Functions (C F Fischer)L2 Basis Function Methods for the Electronic Continuum. Photoionization and Some Related Processes (V Carravetta et al.)B-Spline Based Configuration-Interaction Approach for Photoionization of Two-Electron and Divalent Atoms (T-N Chang)Many-Electron Effects on Auger Transitions (M H Chen)Multiple Excitation Processes in Photoionization (J A R Samson)Atomic Structure Effects in Multiphoton Processes: An Experimental Perspective (L F DiMauro)Many-Body Interactions in Photoionization of Excited Atoms and Ions (F J Wuilleumier)and other papers Readership: Atomic physicists or graduate students (MS level or above). keywords:Photoionization;Many-Body Theory;Many-Body Effects;Atomic Structure;Photoabsorption;Configuration Interaction;Multiple Excitation;Autoionization;Doubly Excited Resonance;Multiphoton Processes

This book is a survey of the field of many-body atomic physics.

Author: J. J. Boyle

Publisher: Cambridge University Press

ISBN: 0521470064

Category: Science

Page: 428

View: 370

This book is a survey of the field of many-body atomic physics. The contributions encompass three major areas of study--atomic structure, atomic photoionization, and electron-atom collisions--and deal with the historical development of many-body theory, theoretical considerations, and applications. It will be a suitable introduction to the field for graduate students and researchers in atomic physics and quantum chemistry.

Author: Lampros A A NikolopoulosPublish On: 2019-03-29

... photoionization of two-electron and divalent atoms Many-body Theory of Atomic Structure (Singapore: World Scientific) pp 213-47 [5] Bachau H, Cormier E, ...

Author: Lampros A A Nikolopoulos

Publisher: Morgan & Claypool Publishers

ISBN: 9781681747125

Category: Science

Page: 194

View: 149

The dynamics of quantum systems exposed to ultrafast (at the femtosecond time-scale) and strong laser radiation has a highly non-linear character, leading to a number of new phenomena, outside the reach of traditional spectroscopy. The current laser technology makes feasible the probing and control of quantum-scale systems with fields that are as strong as the interatomic Coulombic interactions and time resolution that is equal to (or less than) typical atomic evolution times. It is indispensable that any theoretical description of the induced physical processes should rely on the accurate calculation of the atomic structure and a realistic model of the laser radiation as pulsed fields. This book aims to provide an elementary introduction of theoretical and computational methods and by no means is anywhere near to complete. The selection of the topics as well as the particular viewpoint is best suited for early-stage students and researchers; the included material belongs in the mainstream of theoretical approaches albeit using simpler language without sacrificing mathematical accuracy. Therefore, subjects such as the Hilbert vector-state, density-matrix operators, amplitude equations, Liouville equation, coherent laser radiation, free-electron laser, Dyson-chronological operator, subspace projection, perturbation theory, stochastic density-matrix equations, time-dependent Schrödinger equation, partial-wave analysis, spherical-harmonics expansions, basis and grid wavefunction expansions, ionization, electron kinetic-energy and angular distributions are presented within the context of laser-atom quantum dynamics.

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.

Author: Miron Amusia

Publisher: Springer Science & Business Media

ISBN: 9783642247521

Category: Science

Page: 799

View: 468

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.

F. J. Wuilleumier, in Many-body Theory of Atomic Structure and Photoionization, edited by T. N. Chang (World Scientific, Singapore, 1993) p. 351. 29.

Author: Morgan Thomas J

Publisher: World Scientific

ISBN: 9789814548823

Category:

Page: 512

View: 838

Carl Wieman's contributions have had a major impact on defining the field of atomic physics as it exists today. His ground-breaking research has included precision laser spectroscopy; using lasers and atoms to provide important table-top tests of theories of elementary particle physics; the development of techniques to cool and trap atoms using laser light, particularly in inventing much simpler, less expensive ways to do this; the understanding of how atoms interact with one another and light at ultracold temperatures; and the creation of the first Bose-Einstein condensation in a dilute gas, and the study of the properties of this condensate. In recent years, he has also turned his attention to physics education and new methods and research in that area. This indispensable volume presents his collected papers, with annotations from the author, tracing his fascinating research path and providing valuable insight about the significance of the works.

Many - body Theory of Atomic Structure and Photoionization ( World Scientific , Singapore 1993 ) 5.9 D.M.P. Holland , K. Codling , J.B. West , G.V. Marr ...

Author: Heinrich F. Beyer

Publisher: Springer Science & Business Media

ISBN: 3540631852

Category: Science

Page: 233

View: 390

This title is a comprehensive collection of atomic characteristics of highly charged ion sources and elementary processes related to X-ray radiation: energy levels, wavelengths, transition probabilities, cross sections and rate coefficients. Many figures, tables, simple formulas and scaling laws accompany the text wherever possible.

Many-Body Theory of Atomic Structure and Photoionization, World Sci. Publ. Co., Teaneck, New Jersey. Faisal, F. H. M. (1973). J. Phys. B 6, L89.

Author: Benjamin Bederson

Publisher: Academic Press

ISBN: 0080561462

Category: Science

Page: 408

View: 674

Praise for Previous Volumes "This volume maintains the authoritative standards of the series...The editors and publishers are to be congratulated" - M.S. CHILD in PHYSICS BULLETIN "Maintains the high standards of earlier volumes in the series...All the series are written by experts in the field, and their summaries are most timely...Strongly recommended." - G. HERZBERG in AMERICAN SCIENTIST

Chang, T. Many-Body Theory of Atomic Structure; Chapter B-Spline Based Configuration-Interaction Approach for Photoionization of Two-Electron and Divalent ...

Author: Kiyoshi Ueda

Publisher: MDPI

ISBN: 9783038428794

Category: Mathematics

Page: 456

View: 297

This book is a printed edition of the Special Issue "X-Ray Free-Electron Laser" that was published in Applied Sciences

This self-contained text introduces readers to the field of high-energy atomic physics - a new regime of photon-atom interactions in which the photon energies significantly exceed the atomic or molecular binding energies, and which opened ...

Author: Evgeny G. Drukarev

Publisher: Springer

ISBN: 9783319327365

Category: Science

Page: 384

View: 617

This self-contained text introduces readers to the field of high-energy atomic physics - a new regime of photon-atom interactions in which the photon energies significantly exceed the atomic or molecular binding energies, and which opened up with the recent advent of new synchrotron sources. From a theoretical point of view, a small-parameter characteristic of the bound system emerged, making it possible to perform analytic perturbative calculations that can in turn serve as benchmarks for more powerful numerical computations. The first part of the book introduces readers to the foundations of this new regime and its theoretical treatment. In particular, the validity of the small-parameter perturbation expansion and of the lowest-order approximation is critically reviewed. The following chapters then apply these insights to various atomic processes, such as photoionization as a many-body problem, dominant mechanisms for the production of ions at higher energies, Compton scattering and ionization accompanied by creation of e-e+ pairs, and the photoionization of endohedral atoms (e.g. fullerene). Last but not least, the computationally challenging transitions in the electron shell during certain types of nuclear decays are investigated in detail.

6644 Experimentally Derived Intormation On Atomic and Molecular Properties ... The lowest - order many - body perturbation theory is applied to double ...

12 . J. C. Slater , Quantum Theory of Atomic Structure , Vol . II , ( McGraw - Hill , New York , 1960 ) , p . 6 . 13 . F. Herman and s . Skillman , Atomic ...

This book is intended for physicists and chemists who need to understand the theory of atomic and molecular structure and processes, and who wish to apply the theory to practical problems. As far as practicable, the book provides a self-contained account of the theory of relativistic atomic and molecular structure, based on the accepted formalism of bound-state Quantum Electrodynamics. The author was elected a Fellow of the Royal Society of London in 1992.

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.

Author: Miron Ya. Amusia

Publisher: Springer

ISBN: 3642247539

Category: Science

Page: 799

View: 764

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.

It is intended to reflect a part of his manifold contributions to atomic physics over his ... and recently published a book on atomic structure theory .

INTRODUCTION TO MANY-BODY THEORY Photoionization is the process by which a ... states provides an excellent probe of atomic/molecular structure as well as ...

Author: Uwe Becker

Publisher: Springer Science & Business Media

ISBN: 9781461303152

Category: Science

Page: 651

View: 152

Leading investigators offer the first comprehensive study of gas phase photoionization research in the VUV and soft X-ray regime since the massive employment of synchrotron radiation as a spectroscopic tool. Chapters cover all aspects of photoionization phenomena from total cross sections to highly differentiated measurements such as coincidence experiments and spin-resolved electron spectroscopy. This work is abundant with illustrations.

... calculation of accurate photoionization cross sections for atoms near threshold provides a good indication of our understanding of atomic structures .

... Pollutants , Quantitative organic analyses PHOTOIONIZATION 4226 Many - body theory of atomic structure and photoionization ( C3 ) Chang T - N . Book .

Many - Body Theory of Atomic Structure and Photoionization ( World Scientific , Singapore 1993 ) ( 10 ) E.T. Kennedy , J.T. Costello , J.-P. Mosnier : in ...

A procedure for treating correlations in atomic structure is introduced and applied to the calculation of excitation energies, oscillator strengths, and photo-ionization cross sections.

Author: P. L. Altick

Publisher:

ISBN: OCLC:227319432

Category:

Page: 45

View: 533

A procedure for treating correlations in atomic structure is introduced and applied to the calculation of excitation energies, oscillator strengths, and photo-ionization cross sections. The method is the extension of the Hartree-Fock theory known as the random-phase approximation, which has already been applied to a number of other many-body problems. In this application to atomic physics, results are given for the following atoms in column II of the periodic table: beryllium, magnesium, calcium, and strontium. These atoms all have 1 sub S ground states, and only excitations to 1 sub P states are considered. The general conclusion of the study is that the values of the oscillator strengths and photo-ionization cross sections are changed significantly by the correlations, while the changes in the values of the excitation energies are quite small. Wherever comparison with experiment is possible, the inclusion of these correlations improves the agreement between theory and experiment. Their effects are, however, not as marked as in highly degenerate infinite systems or in nuclei. (Author).