Impact-velocity dependence of ejected-electron distributions for ionization in proton-hydrogen collisions

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.60.377· OSTI ID:349359

Sidky, E Y; Lin, C D ^[1]

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1. Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506 (United States)

{ital Ab initio} calculations of ejected-electron momentum distributions are presented for proton on hydrogen collisions at impact energies ranging from 5 to 100 keV and an impact parameter of 1.2 a.u. At low energies the transverse momentum distributions show a double-peak structure similar to what is predicted by a two-state Sturmian theory [Macek and Ovchinnikov, Phys. Rev. Lett. {bold 80}, 2298 (1998)]. In contrast to that theory, however, we do not find the rapid oscillations in the transverse momentum distribution for impact energies between 5 and 15 keV. At higher collision energies the double-peak transverse momentum distribution coalesces into a single peak. For the energy range considered, the longitudinal momentum distribution shows a broad peak at half the projectile velocity except at the higher energies where the distribution moves toward the target nucleus. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 349359
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 60; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR DISTRIBUTION
HYDROGEN
ION-ATOM COLLISIONS
IONIZATION
KEV RANGE 01-10
KEV RANGE 10-100
LONGITUDINAL MOMENTUM
VELOCITY