Impact-velocity dependence of ejected-electron distributions for ionization in proton-hydrogen collisions
- 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, Vol. 60, Issue 1; Other Information: PBD: Jul 1999
- Country of Publication:
- United States
- Language:
- English
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