Differential cross sections for electron capture from helium by 25- to 100-keV incident protons

Journal Article · Mon Jun 01 04:00:00 EDT 1981 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.23.2858· OSTI ID:6193950

Martin, P J; Arnett, K; Blankenship, D M; Kvale, T J; Peacher, J L; Redd, E; Sutcliffe, V C; Park, J T; Lin, C D; McGuire, J H

Experimentally and theoretically determined differential cross sections are reported for electron capture in collisions of protons with helium atoms for incident proton energies of 25, 30, 50, and 100 keV and for center-of-mass scattering angles of 0.0 to 2.0 mrad. The magnitudes of the experimentally determined differential cross sections decrease from 10/sup -10/ to 10/sup -12/ cm/sup 2//sr within the 0.0--0.8-mrad range of the center-of-mass scattering angle. At approximately 0.8 mrad a distinct change in the slope of the differential cross section is observed. The experimental results which are for capture into all bound states of hydrogen are compared with the theoretical results of a calculation for capture into the ground state using the two-state two-center atomic expansion method in the eikonal approximation. Good agreement between the theoretical and the experimental results is obtained with a static potential which accounts for screening of the helium nucleus by a single passive electron.

• Research Organization: Physics Department, University of Missouri-Rolla, Rolla, Missouri 65401
• OSTI ID: 6193950
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 23:6; 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
BEAMS
CAPTURE
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
EIKONAL APPROXIMATION
ELECTRON CAPTURE
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INFORMATION
ION BEAMS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 10-100
NONMETALS
NUMERICAL DATA
RARE GASES