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

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