Rainbow structure and g--u-interference effects in the elastic scattering of low energy protons on deuterium and hydrogen atoms
Elastic differential cross sections for the scattering of low energy protons (E/sub c.m./=11--142 eV) on H and D atoms have been obtained. The curves exhibit clearly rainbow structure, g--u oscillations and a type of rapid interference, if coherent scattering of both sigma/sub g/ and sigma/sub u/ potential curves is taken into account. For comparison, partial wave calculations have been performed using WKB phases and a two-state (1ssigma/sub g/, 2psigma/sub u/) approximation. The agreement with both experimental results and three-state (1ssigma/sub g/, 2psigma/sub u/, 2p..pi../sub u/) calculations of Knudson et al. is excellent, which implies that rotational coupling between the 2psigma/sub u/ and 2p..pi../sub u/ potential curves can be neglected. It is shown that the reduced phases a=..sqrt..E/2..mu..N can be described as a single function of the reduced angle tau=Etheta for all energies and both isotopes. This function agrees with both two-state calculations of the authors and three-state calculations of Knudson et al. (AIP)
- Research Organization:
- Hahn-Meitner-Institut fur Kernforschung Berlin GmbH, Bereich Strahlenchemie, 1000 Berlin 39, Federal Republic of Germany
- OSTI ID:
- 7266855
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 65:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DEUTERIUM
ION-ATOM COLLISIONS
HYDROGEN
HYDROGEN IONS 1 PLUS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ATOM COLLISIONS
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
HYDROGEN IONS
HYDROGEN ISOTOPES
ION COLLISIONS
IONS
ISOTOPES
LIGHT NUCLEI
NONMETALS
NUCLEI
ODD-ODD NUCLEI
SCATTERING
STABLE ISOTOPES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena