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Title: Angular correlation in the two-electron continuum

Abstract

Following absorption of a single photon, angles of simultaneous emission of two electrons from a He(n {sup 1}S) atom become more correlated with increasing n. We find that the strength of this correlation is due to the two-electron continuum of the electron-impact ionization of the He{sup +}(ns) ion. The strength is determined by the width of the momentum profile of the ionic ns state but not the strength of the electron correlation in the He initial state. This can explain the increasing (over He) angular correlation strength found in double photoionization of targets such as Be, Ne, and H{sub 2}.

Authors:
;  [1];  [2]
  1. Research School of Physical Sciences, Australian National University, Canberra ACT 0200 (Australia)
  2. (Australia)
Publication Date:
OSTI Identifier:
20974497
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.73.020708; (c) 2006 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; ABSORPTION; ANGULAR CORRELATION; ATOMS; BERYLLIUM; ELECTRON CORRELATION; ELECTRON-ATOM COLLISIONS; ELECTRONS; EMISSION; HELIUM; HELIUM IONS; HYDROGEN; MOLECULES; NEON; PHOTOIONIZATION; PHOTONS

Citation Formats

Kheifets, A. S., Bray, I., and Center for Atomic, Molecular, and Surface Physics, Physics and Energy Studies, Murdoch University, Perth 6150. Angular correlation in the two-electron continuum. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.020708.
Kheifets, A. S., Bray, I., & Center for Atomic, Molecular, and Surface Physics, Physics and Energy Studies, Murdoch University, Perth 6150. Angular correlation in the two-electron continuum. United States. doi:10.1103/PHYSREVA.73.020708.
Kheifets, A. S., Bray, I., and Center for Atomic, Molecular, and Surface Physics, Physics and Energy Studies, Murdoch University, Perth 6150. Wed . "Angular correlation in the two-electron continuum". United States. doi:10.1103/PHYSREVA.73.020708.
@article{osti_20974497,
title = {Angular correlation in the two-electron continuum},
author = {Kheifets, A. S. and Bray, I. and Center for Atomic, Molecular, and Surface Physics, Physics and Energy Studies, Murdoch University, Perth 6150},
abstractNote = {Following absorption of a single photon, angles of simultaneous emission of two electrons from a He(n {sup 1}S) atom become more correlated with increasing n. We find that the strength of this correlation is due to the two-electron continuum of the electron-impact ionization of the He{sup +}(ns) ion. The strength is determined by the width of the momentum profile of the ionic ns state but not the strength of the electron correlation in the He initial state. This can explain the increasing (over He) angular correlation strength found in double photoionization of targets such as Be, Ne, and H{sub 2}.},
doi = {10.1103/PHYSREVA.73.020708},
journal = {Physical Review. A},
number = 2,
volume = 73,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}