Electron detachment in collisions of negative ions: H/sup -/ + He

Journal Article · Thu Nov 01 04:00:00 EST 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.20.1905· OSTI ID:5909578

Herzenberg, A; Ojha, P

Contrary to the expectation from a compound-state model, observation shows that the detachment cross section increases with energy in the ''adiabatic'' region below 2 keV. The compound-state model is not appropriate because a strong s-wave component in the wave function allows the extra electron to run away as soon as its state becomes unbound. The detachment cross section increases with collision velocity because detachment is induced by a breakdown of the Born-Oppenheimer approximation, which shifts to larger separations of the nuclei as the collision velocity increases.

• Research Organization: Department of Engineering and Applied Science, Yale University, New Haven, Connecticut 06520
• OSTI ID: 5909578
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 20:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ADIABATIC APPROXIMATION
ANIONS
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRON DETACHMENT
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FLUIDS
HELIUM
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
NONMETALS
RARE GASES