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.
Keywords
Angular distribution (Nuclear physics); Helium; Photoionization; Synchrotron radiation
Disciplines
Atomic, Molecular and Optical Physics | Physical Chemistry
Language
English
Permissions
Copyright American Physical Society. Used with permission.
Identifier
DOI: 10.1103/PhysRevLett.67.3764
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