Three-body collision dynamics for single ionization of helium by protons and antiprotons
- Univ. of Missouri, Rolla, MO (United States)
Proton and AntiProton collisions with Helium have been studied at 100 keV and 300 keV using the Classical Trajectory Monte Carlo method. Single differential cross sections of the longitudinal momentum of the recoil ion and ionized electron have been calculated at the given energies. Proton impact shows the recoil ion peak slightly in the backward direction of the initial projectile momentum, and the electron peak is in the forward direction, with the electron peak in the backward direction. Projection of the electron momentum onto a collision plane defined by the initial projectile momentum and the recoil ion`s final transverse momentum show major differences in p and {bar p} impact. Proton collisions at 100 keV show the electrons ejected into a saddle point between the projectile and target. Electrons ionized during antiproton impact are ejected backward with respect to both the initial projectile momentum and the final recoil transverse momentum. A binary electron ring is observed at large recoil momenta, which is enhanced by the negative charge of the antiproton.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 394322
- Report Number(s):
- CONF-9605105--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN 0003-0503; ISSN BAPSA6
- Country of Publication:
- United States
- Language:
- English
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