Excitation of Atoms and Broadening of Spectral Lines

Softcover Nachdruck of the original 1. Auflage 1981
ISBN: 978-3-642-96558-6
Verlag: Springer

Buch, Englisch, Band 7, 318 Seiten, Format (B × H): 155 mm x 235 mm, Gewicht: 505 g

Reihe: Springer Series in Chemical Physics

New applications of atomic spectroscopy in laser physics, laser spectrosco­ py, laser frequency and wavelength measurements, plasma physics, astrophysics, and some other related problems have been developed very intensively in the last years. As a result, the approximate methods of calculation of the transition probabilities and cross sections necessary for all these applications have become of vastly increased importance. At the same time, some new problems have arisen in the theory of spectral line broadening such as the shape of nonlinear resonances in the spectra of gas lasers, interference effects, and some other problems connected with various spectroscopic methods of plasma diagnostics. This book is devoted to the systematic treatment of the theory of the elementary processes responsible for the excitation of atomic spectra and the theory of spectral line broadening. The choice of problems is significantly different from that traditional for books on the theory of atomic collisions. The main goal of the book is to present the most efficient and useful of comparatively simple approximate methods for the calcula­ tion and estimation of cross sections. Numerous tables containing the results of approximate cross section calculations for the most important elementary processes are included in the book. Comprehensive presenta­ tion of the theory of atomic collisions is out of the scope of this book and can be found elsewhere. However, the fundamentals of the general theory of collisions which are necessary for formulation of approximate methods are given in Chapter 2.

Zielgruppe

Research

Autoren/Hrsg.

Sobelman, I. I.

Yukov, E. A.

Vainshtein, L.A.

Inhaltsverzeichnis

1. Elementary Processes Giving Rise to Spectra.- 1.1 Cross Sections.- 1.2 Populations of Atomic Levels in a Plasma; Rates of Direct and Reverse Processes.- 2. Theory of Atomic Collisions.- 2.1 Fundamentals of Scattering Theory.- 2.2 Theory of Electron-Atom Collisions.- 2.3 First-Order Approximation.- 3. Approximate Methods for Calculating Cross Sections.- 3.1 Born Approximation.- 3.2 Some Refinements of the Born Approximation.- 3.3 More Accurate Methods of Calculation of Excitation Cross Sections.- 3.4 Excitation of Highly Charged Atoms.- 3.5 Transitions Between Highly Excited Levels.- 4. Collisions Between Heavy Particles.- 4.1 Impact-Parameter Method.- 4.2 Transitions Caused by a Multipole Interaction.- 4.3 Charge Exchange.- 5. Some Problems of Excitation Kinetics.- 5.1 Rate Coefficients for Elementary Proccesses in a Plasma. Approximation of Cross Sections and Rate Coefficients by Analytic Formulas.- 5.2 Dielectronic Recombination.- 5.3 Satellites of Resonance Lines in Spectra of Highly Charged Atoms.- 5.4 Populations of Excited Levels in a Plasma.- 6. Tables and Formulas for the Estimation of Effective Cross Sections.- 6.1 Tables of Numerical Results.- 6.2 Formulas Defining the Angular Factors.- 7. Broadening of Spectral Lines.- 7.1 Model of a Classical Oscillator.- 7.2 General Theory of Impact Broadening.- 7.3 Broadening of Lines of the Hydrogen Spectrum in a Plasma.- 7.4 Line Broadening of Nonhydrogenlike Spectra in a Plasma.- 7.5 Broadening by Uncharged Particles.- 7.6 Spectroscopic Methods of Investigating Elastic Scattering of Slow Electrons.- References.- List of Symbols.