| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 23:11 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Elastic and Inelastic Photon Scattering by Atomic Inner Shell Electrons
Authors:
A. Costescu (1), M. Moldovan (1)(2), S. Spanulescu (3), C. Stoica (1)
Affiliation:
(1)Department of Physics, University of Bucharest, MG11, Bucharest-Magurele 077125, Romania
(2)Department of Physics, UMF Targu Mures, Targu Mures, 540142, Romania
(3)Department of Physics, Hyperion University of Bucharest, Bucharest 030629, Romania
E-mail
a_costescu@hotmail.com
Keywords:
angular distribution, cross section, screening, effective charge
Abstract:
When large photon momentum transfer are involved the most important contribution on the whole atom to the cross section of the scattering process is given by inner electrons. Taking into account retardation, multipoli and relativistic kinematics effects we get analytical formulae for Compton, Rayleigh and photoeffect cross sections which give at high accuracy the contributions due to the 1s and 2s bound electrons. Comparison with numerical full relativistic results shows that in the high energy regime the four 1s and 2s electrons contribute at least 80% to the angular distribution of Rayleigh scattering as well as to the total photoeffect cross section of the whole atom. The screening effects are considered via an effective charge depending on the photon momentum transfer.
|
|
|
|