ASYMMETRY PARAMETER AND MOMENTUM DISTRIBUTION OF THE NUCLEUS IN DOUBLE PHOTOIONIZATION OF HELIUM

Authors
PONT M SHAKESHAFT R
Citation
M. Pont et R. Shakeshaft, ASYMMETRY PARAMETER AND MOMENTUM DISTRIBUTION OF THE NUCLEUS IN DOUBLE PHOTOIONIZATION OF HELIUM, Physical review. A, 54(2), 1996, pp. 1448-1451
Citations number
16
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
54
Issue
2
Year of publication
1996
Pages
1448 - 1451
Database
ISI
SICI code
1050-2947(1996)54:2<1448:APAMDO>2.0.ZU;2-K
Abstract
We have calculated the asymmetry parameter and the momentum distributi on of the recoiling nucleus when a helium atom undergoes double ioniza tion by one (linearly polarized) photon with energy 85, 99, or 159 eV. An empirical fit, based on representing the dynamical part of the dou bly differential cross section through a single-parameter Gaussian mod el, is surprisingly accurate over this energy range.