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Electron transfer in p-He/sup +/ and He/sup 2 +/-H collisions using a Sturmian basis

Journal Article · · Phys. Rev. A; (United States)
Total cross sections are reported for electron transfer into all bound states in collisions of protons with /sup 4/He/sup +/ ions and /sup 4/He/sup 2 +/ ions with H atoms at center-of-mass energies from 4 to 120 keV and 4 to 40 keV, respectively. The coupled-state calculations employ 19--24 Sturmian basis functions. Convergence of cross sections with respect to the size of this basis has been studied, and total cross sections are estimated to be converged to a few percent. A comparison is made with molecular-state, atomic-state, classical, and experimental results. In the energy region of overlap, Sturmian-state results and plane-wave-factor, molecular-state results agree to within 9% except for the p-He/sup +/ process at 14 keV, where the Sturmian results are 37% larger, probably reflecting the need to include the continuum which was omitted in the molecular calculations. There is also a similar discrepancy with the experimental results of Peart, Grey, and Dolder; these Sturmian results, however, do tie in with the experimental results of Angel, Sewell, Dunn, and Gilbody at higher energies.
Research Organization:
Physics Department, Pennsylvania State University, Wilkes-Barre Campus, Wilkes-Barre, Pennsylvania 18708
OSTI ID:
5525674
Journal Information:
Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 25:2; ISSN PLRAA
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BOUND STATE
CATIONS
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL EQUATIONS
ELEMENTS
ENERGY RANGE
EQUATIONS
HELIUM IONS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
IMPACT PARAMETER
ION COLLISIONS
ION-ATOM COLLISIONS
ION-ION COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
NONMETALS
STURM-LIOUVILLE EQUATION
TOTAL CROSS SECTIONS