Differential cross sections for electron capture from helium by 25- to 100-keV incident protons
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), Vol. 23:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HELIUM
ION-ATOM COLLISIONS
HYDROGEN IONS 1 PLUS
DIFFERENTIAL CROSS SECTIONS
EIKONAL APPROXIMATION
ELECTRON CAPTURE
EXPERIMENTAL DATA
ION BEAMS
KEV RANGE 10-100
ATOM COLLISIONS
BEAMS
CAPTURE
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
HYDROGEN IONS
INFORMATION
ION COLLISIONS
IONS
KEV RANGE
NONMETALS
NUMERICAL DATA
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena