Document Type
Article
Publication Date
12-1991
Publication Title
Physical Review Letters
Publisher
American Physical Society
Volume
67
Issue
27
First page number:
3764
Last page number:
3767
Abstract
Photoelectron spectra of helium have been measured at different angles and at various energies above the double-ionization threshold up to 120 eV to investigate the behavior of the energy and angular distributions, of shake-off electrons. Both energy and angular distributions clearly show a U-shaped profile which turns to a flat curve near threshold pointing to a uniform intensity distribution over the kinetic energy for all angles in this excitation energy regime. Our results for the angular-distribution asymmetry parameter indicate qualitative agreement with theoretical predictions but fail to provide them quantitatively.
Controlled Subject
Angular distribution (Nuclear physics); Helium; Photoionization; Synchrotron radiation
Disciplines
Atomic, Molecular and Optical Physics | Physical Chemistry
File Format
File Size
240 KB
Language
English
Permissions
Copyright American Physical Society. Used with permission.
Rights
IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/
Repository Citation
Wehlitz, R.,
Heiser, F.,
Hemmers, O.,
Langer, B.,
Menzel, A.,
Becker, U.
(1991).
Electron-Energy and –Angular Distributions in the Double Photoionization of Helium.
Physical Review Letters, 67(27),
3764-3767.
https://digitalscholarship.unlv.edu/hrc_fac_articles/57