Electron capture in small-angle Ar/sup 2 +/+Ar collisions

Journal Article · Sun May 01 04:00:00 EDT 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.27.2396· OSTI ID:6083650

Stevens, J; Peterson, R S; Pollack, E

Electron capture in Ar/sup 2 +/+Ar is studied at low keV energies. Using Ar/sup 2 +/+He collisions as an energy reference we show that the dominant single-electron-capture process is endothermic and of the type Ar/sup 2 +/(/sup 3/P)+Ar..-->..Ar/sup +/(/sup 2/P)+Ar/sup +/(3s/sup 2/3p/sup 4/nl). Detailed studies at 2.4 keV show nl to be predominantly 3d and 4p. Weaker exothermic processes are found and due mainly to long-lived, highly excited states of Ar/sup 2 +/. The direct scattering and double-electron-capture channels are also studied. The direct scattering occurs with no Ar-target excitation. Differential cross sections are presented for the collision processes. The single-electron-capture results are interpreted with the use of a simple model in which a strongly attractive intermediate state couples the incident and outgoing channels.

• Research Organization: Department of Physics, University of Connecticut, Storrs, Connecticut 06268
• OSTI ID: 6083650
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 27:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ARGON IONS
ATOM COLLISIONS
ATOMIC IONS
CAPTURE
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON CAPTURE
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
NONMETALS
RARE GASES