Multiple-electron ionization, capture, and loss by 19-MeV Fq+ (q=2–9) in collisions with Ne and Ar
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ID: 268724
1995
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Abstract
Charge-exchange processes in fast collisions of ${\mathrm{F}}^{\mathit{q}+}$ (q=2--9) on Ne and Ar gas targets have been studied using the projectile--recoil-ion coincidence method. The target ionization without a projectile charge change increases with increasing projectile charge approximately as \ensuremath{\sim}${\mathit{q}}^{1.4}$. This dependence is weaker than the ${\mathit{q}}^{2}$ dependence predicted by the first Born approximation because of the large ionization probabilities involved. The single-electron-capture cross sections follow the known ${\mathit{q}}^{3}$ scaling law, while the double-electron-capture cross sections display a ${\mathit{q}}^{6}$ dependence, as predicted by the independent-electron approximation for small capture probabilities. Single- and double-electron loss from the L shell decreases with increasing q mainly because of the decrease in the number of L-shell electrons, while binding-energy effects play only a minor role. In contrast, the large sudden decrease in electron-loss cross sections once K-shell electrons must be removed is due to the large increase in binding energy.
| Reference Key |
heber1995physicalmultiple-electron
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| Authors | O. Heber;G. Sampoll;B. B. Bandong;R. J. Maurer;R. L. Watson;I. Ben-Itzhak;J. M. Sanders;J. L. Shinpaugh;P. Richard; |
| Journal | physical review a |
| Year | 1995 |
| DOI |
doi:10.1103/PhysRevA.52.4578
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| URL | |
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