Oscillations in mean captureQvalues as functions of the projectile charge in slow-He (25≤q≤44) collisions
- 1 March 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 51 (3) , 2191-2198
- https://doi.org/10.1103/physreva.51.2191
Abstract
We have measured mean Q values for single-electron capture and transfer ionization in slow collisions between Xe projectiles of very high charge q and He. For the former process we observed an oscillatory behavior as a function of q, reflecting the discrete nature of the capture states. The experimental Q values for transfer ionization are substantially higher than the minimum Q values predicted by the extended classical over-the-barrier model. These results offer an explanation for earlier reported anomalously low ratios between the cross sections for two- and one-electron removal from He in collisions with highly charged Xe [H. Andersson, G. Astner, and H. Cederquist, J. Phys. B 21, L187 (1988); H. Cederquist et al., ibid. 25, L69 (1992)].Keywords
This publication has 26 references indexed in Scilit:
- Strong radiative decay of double Rydberg states in high-qionsPhysica Scripta, 1993
- Multiple electron capture by highly charged ions at keV energiesJournal of Physics B: Atomic, Molecular and Optical Physics, 1992
- On the role of transfer excitation in slow Xeq+-He,Xe (15 < or = q < or = 42) collisionsJournal of Physics B: Atomic, Molecular and Optical Physics, 1992
- Transfer excitation in slow collisions between ions of very high charge and two-electron targetsPhysical Review A, 1991
- Total cross sections for different charge changing processes in collisions of highly charged Xe ions with He atoms at low energyJournal of Physics B: Atomic, Molecular and Optical Physics, 1988
- Energy gain spectroscopy studies of electron capture by Xeq+(10⩽q⩽20) in collisions with Ne, Ar and XeJournal of Physics B: Atomic and Molecular Physics, 1987
- Two- and more-electron transitions in slow multicharged ion-He collisionsNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1987
- Energy-gain spectroscopy studies of state-selective electron capture for multiply charged Ar recoil ions: Comparison with the extended classical barrier modelNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1985
- Absolute cross sections for multi-electron processes in low energy Arq+−Ar collisions: Comparison with theoryNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1985
- Autoionisation of N5+(nln'l') with n=2,3,4 and n'⩾n measured by electron spectrometry in collisions of N7+with He and H2, at 4.9 keV amu-1Journal of Physics B: Atomic and Molecular Physics, 1984