Density effect in relativistic K-shell ionization

D. W. Spooner, W. E. Meyerhof, J. J. Kuffner, E. C. Montenegro, Keizo Ishii, S. E. Kuhn, D. M. Kawall, D. G. Jensen, Z. E. Meziani

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Using a grazing emission method, we have made measurements of 22.6-GeV electron impact ionization cross sections at the front and back faces of ∼ 70-μm thick Al and Cu foils. These give, respectively, the cross sections without and with a density effect predicted by Fermi. For Cu, the back cross section ratio at 22.6 and 5.1 GeV (previously measured) is 1.00±0.04, confirming the predicted energy independence of this cross section. The absolute cross sections agree overall with theoretical calculations.

Original languageEnglish
Pages (from-to)265-268
Number of pages4
JournalZeitschrift für Physik D Atoms, Molecules and Clusters
Issue number4
Publication statusPublished - 1994 Dec 1


  • 34.80.Dp

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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