Published December 1, 1989 | Version v1
Journal article Metadata-only

Polarized electron-impact ionization of metastable helium

Creators

  • 1. Fakultat fuer Physik, Universitaet Bielefeld, Postfach 8640, Universitaetsstrasse 25, D-4800 Bielefeld, Federal Republic of Germany (Germany, F.R.)

Description

The singlet (σs) and triplet (σt) parts of the total ionization cross section were determined in the energy range from threshold to five times the threshold value with a crossed beam arrangement of polarized electrons and spin-polarized He(23S) atoms. The measured spin asymmetry, AI=(σs-σt)/(σs+3σt), is compared with results for the lithium atom. Both asymmetries are quite similar. Comparison with a distorted-wave Born approximation shows strong disagreement in the vicinity of the threshold

Additional details

Publishing Information

Journal Title
Physical Review, A
Journal Volume
40
Journal Issue
11
Series
Phys. Rev., A.
Journal Page Range
6734-6736
ISSN
0556-2791
CODEN
PLRAA

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
21033018
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS;
Descriptors DEI
COLLIDING BEAMS; CROSS SECTIONS; DWBA; ELECTRON-ATOM COLLISIONS; HELIUM; IONIZATION; LITHIUM; METASTABLE STATES; POLARIZED BEAMS; POLARIZED TARGETS; SPIN
Descriptors DEC
ALKALI METALS; ANGULAR MOMENTUM; ATOM COLLISIONS; BEAMS; BORN APPROXIMATION; COLLISIONS; ELECTRON COLLISIONS; ELEMENTS; ENERGY LEVELS; EXCITED STATES; METALS; NONMETALS; PARTICLE PROPERTIES; RARE GASES; TARGETS