Energy-loss calculations for medium-energy rare gas+H/sub 2/ collision

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.26.1931· OSTI ID:6510876

Snyder, R; Russek, A

Cross sections differential in energy loss and scattering angle and most-probable reciprocal-mass functions are calculated for several rare gases on H/sub 2/ collisions i the low-keV collision-energy range. Specifically, the collision systems He+H/sub 2/, Ne+H/sub 2/, and Ne/sup +/+H/sub 2/ have been considered. The classical-trajectory calculations are based on a triatomic-molecular potential-functional form suggested by ab initio calculations of the He-H/sub 2/ energy He-H/sub 2/ energy surface, which serves as a prototype for all rare-gas-H/sub 2/ systems. The parameters in that functional form have been fitted from the experimental differential energy-loss measurements for Ne on H/sub 2/ collisions to yield the Ne-H/sub 2/ energy surface, and from the Ne/sup +/ on H/sub 2/ differential energy-loss measurements to yield the Ne-H/sub 2//sup +/ energy surface. With the energy surfaces thus parametrized, the calculated differential energy-loss cross sections agree well with the experimental data. They explain the anomalously large range of scattering angle in which the collision is elastic, with no vibrational-rotational excitation.

• Research Organization: Department of Physics, University of Connecticut, Storrs, Connecticut 06268
• OSTI ID: 6510876
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 26:4; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DIRECT REACTIONS
ELEMENTS
ENERGY LOSSES
FLUIDS
GASES
HELIUM
HYDROGEN
INCIDENCE ANGLE
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
LOSSES
MOLECULE COLLISIONS
NEON
NEON IONS
NONMETALS
NUCLEAR REACTIONS
QUASI-ELASTIC SCATTERING
QUASI-FREE REACTIONS
RARE GASES
SCATTERING