Rainbow structure and g--u-interference effects in the elastic scattering of low energy protons on deuterium and hydrogen atoms

Journal Article · Fri Oct 01 04:00:00 EDT 1976 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.433439· OSTI ID:7266855

Ding, A; Karlau, J; Weise, J

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), Journal Name: J. Chem. Phys.; (United States) Vol. 65:7; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DEUTERIUM
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELEMENTS
FLUIDS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
HYDROGEN ISOTOPES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
ISOTOPES
LIGHT NUCLEI
NONMETALS
NUCLEI
ODD-ODD NUCLEI
SCATTERING
STABLE ISOTOPES