Deviation from first-order perturbation theory observed at intermediate relativistic velocities for the ionisation of highly-charged heavy projectiles
P. RymuzaGSI, Darmstadt, GermanyTh. StöhlkerGSI, Darmstadt, GermanyC. L. CockeGSI, Darmstadt, GermanyH. GeißelGSI, Darmstadt, GermanyC. KozhuharovGSI, Darmstadt, GermanyP. H. MoklerGSI, Darmstadt, GermanyR. MoshammerGSI, Darmstadt, GermanyF. NickelGSI, Darmstadt, GermanyC. ScheidenbergerGSI, Darmstadt, GermanyZ. StachuraGSI, Darmstadt, GermanyJ. UllrichGSI, Darmstadt, GermanyA. WarczakGSI, Darmstadt, Germany
1993en
ABI
Abstract
Projectile K-shell ionization cross sections were measured for 80-200 MeV u-1 H- and He-like Bi ions on thin C, Al and Ni targets. The results are compared with predictions of first-order perturbation theories, RSCA and PWBA, as well as with experimental results published for Xe and U ions at similar ratios eta of projectile velocity to K-shell electron velocity. All experimental data lie a factor of 1.5 above theory for 0.6< eta <1.5.
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Cited by 30 references