Projectile-charge dependence of inner-shell-ionization cross sections in a high-velocity region

K. Ishii, K. Sera, A. Yamadera, M. Sebata, H. Arai, S. Morita

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Ratios of ionization cross sections for proton impact to those for He-ion3 impact have been measured on Al K and Y L shells at projectile energies of 7, 9, 12, 16, and 21 MeV /amu. The ratio tends to unity with an increase in the projectile energy for both the Al K and Y L ionizations. This behavior can well be explained in terms of the Binstock-Reading theory combined with the distant-collision theory of Hill and Merzbacher: The polarization effect in distant collisions and the decreasing electron-density effect in close collisions cancel out each other in this high-energy region.

Original languageEnglish
Pages (from-to)2511-2518
Number of pages8
JournalPhysical Review A
Volume25
Issue number5
DOIs
Publication statusPublished - 1982 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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