Many-Particle Effects in Resonant Inelastic Scattering of an X-ray Photon by an Atom

Journal Article · Sat Oct 01 00:00:00 EDT 2005 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/1.2131928· OSTI ID:20702639

Hopersky, A N; Nadolinsky, A M; Yavna, V A ^[1]

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1. Rostov State University of Transport Communication, Rostov-on-Don, 344038 (Russian Federation)

The influence of many-particle effects on the shape and values of the double differential cross section for the resonant inelastic scattering of a linearly polarized X-ray photon by a free atom near the K and KL{sub 23} ionization thresholds has been theoretically analyzed for the neon atom. The calculations have been performed using the nonrelativistic Hartree-Fock approximation for single-electron wavefunctions and the dipole approximation for the anomalous dispersion component of the cross section. The analytical structure of the contact part of the scattering cross section has been obtained beyond the dipole approximation. The effects of the radial relaxation of electron shells, spin-orbit and multiplet splitting, and configuration interaction in the doubly excited atomic states, as well as the Auger and radiative decays of the produced vacancies, are taken into account. The nature and role of the effect of correlation amplitudes, which is responsible for the appearance of the nonzero amplitudes of nonradiative transitions between intermediate and final single-electron states of the same symmetry that are obtained in different Hartree-Fock fields, have been analyzed also. The calculations are predictive and, for an incident-photon energy of 5.41 keV, agree well with experimental results for the K{alpha} X-ray emission spectrum of the neon atom.

• OSTI ID: 20702639
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 101, Issue 4; Other Information: Translated from Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki, ISSN 0044-4510, 128, 698-713 (No. 4, 2005); DOI: 10.1134/1.2131928; (c) 2005 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); TN:; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
AUGER EFFECT
CONFIGURATION INTERACTION
CORRELATIONS
DIPOLES
ELECTRONS
EMISSION SPECTRA
HARTREE-FOCK METHOD
INELASTIC SCATTERING
IONIZATION
KEV RANGE 01-10
L-S COUPLING
NEON
PHOTON-ATOM COLLISIONS
PHOTONS
POLARIZATION
RADIATIVE DECAY
VACANCIES
WAVE FUNCTIONS
X-RAY SPECTRA