Electron detachment in low-energy collisions of halogen anions with atomic hydrogen

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.255· OSTI ID:5338036

Huels, M A; Fedchak, J A; Champion, R L; Doverspike, L D ^[1]; Gauyacq, J P; Teillet-Billy, D ^[2]

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1. Department of Physics, College of William and Mary, Williamsburg, Virginia 23185 (United States)
2. Laboratoire des Collisions Atomiques et Moleculaires, Batiment 351, Universite de Paris (enSud (Paris XI), 91405 Orsay Cedex (France))

Total electron-detachment cross sections [sigma][sub [ital e]] for collisions of F[sup [minus]], Cl[sup [minus]], Br[sup [minus]], and I[sup [minus]] with atomic hydrogen have been measured for relative collision energies [ital E] ranging from 0.1 to 20 eV. For F[sup [minus]], Cl[sup [minus]], and Br[sup [minus]], [sigma][sub [ital e]] is found to decrease with increasing [ital E] and is fairly well described by a simple orbiting model in which an effective polarizability is used to describe the interaction of the anion with atomic hydrogen at small internuclear separations. For the system I[sup [minus]]+H, [sigma][sub [ital e]] increases with increasing collision energy. The measured [sigma][sub [ital e]] for Cl[sup [minus]]+H is also found to agree well with calculations based on an effective-range approximation. Charge-transfer cross sections have been measured for F[sup [minus]], Cl[sup [minus]], and I[sup [minus]]+H and are found to be small.

• OSTI ID: 5338036
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
ATOM COLLISIONS
BROMINE IONS
CHARGED PARTICLES
CHLORINE IONS
COLLISIONS
CROSS SECTIONS
ELECTRICAL PROPERTIES
ELECTRON DETACHMENT
ELECTRON TRANSFER
ELEMENTS
ENERGY RANGE
EV RANGE
FLUORINE IONS
HYDROGEN
IODINE IONS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MILLI EV RANGE
NONMETALS
PHYSICAL PROPERTIES
POLARIZABILITY
TOTAL CROSS SECTIONS