State-selective differential cross sections for double-electron capture in 0.25{endash}0.75-MeV He{sup 2+}-He collisions
- Institut fuer Kernphysik, Universitaet Frankfurt, August Euler Strasse 6, D60486 Frankfurt (Germany)
- GSI, D64291 Darmstadt (Germany)
For 0.25{endash}0.75-MeV He{sup 2+} on He collisions we have measured total state selective double capture cross sections and cross sections differential in projectile scattering angle. For 0.25 MeV we present also state-selective scattering-angle-dependent double-capture cross sections. The projectile energy loss (the final electronic state) as well as the transverse momentum transfer (i.e., the projectile scattering angle) have been obtained by measuring the momentum vector of the recoil ion using cold target recoil ion momenum spectroscopy. The resonant transfer to the ground state is found to be by far the dominant double-capture channel. Capture to nonautoionizing excited states is smaller by about a factor of 7, and results in larger scattering angles than the ground-state double capture. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 565851
- Journal Information:
- Physical Review A, Vol. 57, Issue 1; Other Information: PBD: Jan 1998
- Country of Publication:
- United States
- Language:
- English
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