Correlations in the highenergy photoeffect
Abstract
We examine correlations in highenergy photoeffect, utilizing a perturbative treatment of the effects beyond the independent particle approximation (IPA) in the highenergy photoionization of states with arbitrary values of the angular momenta l. The dominant mechanism of IPA breaking is discussed. The dependence of IPA breaking contributions on the parameters 1/Z and {alpha}Z is analyzed. In the general case the amplitude is expressed as a linear combination of IPA amplitudes. The development of precise experiments, together with the demonstration that there is substantial cancellation among the nonrelativistic partial correlations amplitudes in many cases, particularly for groundstate atoms, makes a relativistic approach to the problem desirable, even at relatively low values of photon energy.
 Authors:
 Petersburg Nuclear Physics Institute, St. Petersburg 188300 (Russian Federation)
 University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
 Publication Date:
 OSTI Identifier:
 20786300
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. A; Journal Volume: 72; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevA.72.062701; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 74 ATOMIC AND MOLECULAR PHYSICS; AMPLITUDES; ANGULAR MOMENTUM; APPROXIMATIONS; ATOMS; CORRECTIONS; CORRELATIONS; GROUND STATES; PERTURBATION THEORY; PHOTOIONIZATION; PHOTONATOM COLLISIONS; PHOTONS; RELATIVISTIC RANGE
Citation Formats
Drukarev, E. G., and Pratt, R. H. Correlations in the highenergy photoeffect. United States: N. p., 2005.
Web. doi:10.1103/PHYSREVA.72.0.
Drukarev, E. G., & Pratt, R. H. Correlations in the highenergy photoeffect. United States. doi:10.1103/PHYSREVA.72.0.
Drukarev, E. G., and Pratt, R. H. Thu .
"Correlations in the highenergy photoeffect". United States.
doi:10.1103/PHYSREVA.72.0.
@article{osti_20786300,
title = {Correlations in the highenergy photoeffect},
author = {Drukarev, E. G. and Pratt, R. H.},
abstractNote = {We examine correlations in highenergy photoeffect, utilizing a perturbative treatment of the effects beyond the independent particle approximation (IPA) in the highenergy photoionization of states with arbitrary values of the angular momenta l. The dominant mechanism of IPA breaking is discussed. The dependence of IPA breaking contributions on the parameters 1/Z and {alpha}Z is analyzed. In the general case the amplitude is expressed as a linear combination of IPA amplitudes. The development of precise experiments, together with the demonstration that there is substantial cancellation among the nonrelativistic partial correlations amplitudes in many cases, particularly for groundstate atoms, makes a relativistic approach to the problem desirable, even at relatively low values of photon energy.},
doi = {10.1103/PHYSREVA.72.0},
journal = {Physical Review. A},
number = 6,
volume = 72,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2005},
month = {Thu Dec 15 00:00:00 EST 2005}
}

We investigate the total effect of correlations on photoionization of atomic states with nonzero orbital momentum in the nonrelativistic highenergy asymptotic limit, considering the exclusive case of the dominant final state of an initial neutral atom. We find that the substantial cancellation of the dominant intrashell correlations, which had been reported earlier, can be understood utilizing the closure properties satisfied by the eigenfunctions of the nonrelativistic Hamiltonian. Considering the sum of correlations with all states, occupied or not, we show that complete sum is equal to the contribution of the highenergy part of the continuum. Consequently there is a totalmore »