Systematic theoretical investigation of charge exchange in He/sup +/-alkali-atom collisions

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.23.119· OSTI ID:6756712

Sidis, V; Kubach, C; Pommier, J

A comprehensive systematic study of near-resonant charge exchange into He*(n=2) levels in He/sup +/--alkali-atom collisions is reported. The relevant quasimolecular properties of the (He-alkali)/sup +/ systems are obtained within the one-electron projected-valence-bond method of Kubach and Sidis. The detailed investigation of the considered systems enables one to assess the relevance of the two-state Demkov model for near-resonant charge exchange and the role of rotational coupling. The present multistate close-coupling treatment considerably improves upon the previous simplified theory of Olson and Smith and nicely reproduces the measured relative abundance of the specific He*(2 /sup 3,1/S, 2 /sup 3,1/P) states formed by charge exchange. The calculated summed total charge-exchange cross sections generally agree with experiment for He/sup +/-Cs, -Rb, and -K, whereas problems remain for He/sup +/-Na.

• Research Organization: Laboratoire des Collisions Atomiques et Moleculaires, Batiment 351, Universite Paris-Sud, 91405 Orsay Cedex, France
• OSTI ID: 6756712
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 23:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
CESIUM
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
EXCHANGE INTERACTIONS
EXCITED STATES
HELIUM IONS
INTERACTIONS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
METALS
POTASSIUM
RUBIDIUM
SODIUM