Density effect in Cu K-shell ionization by 5.1-GeV electrons
Autor: | D. G. Jensen, W. E. Meyerhof, D. Kawall, Z. E. Meziani, S. E. Kuhn, D. N. Faust, D. W. Spooner |
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Rok vydání: | 1992 |
Předmět: | |
Zdroj: | Physical review letters. 68(15) |
ISSN: | 1079-7114 |
Popis: | We have made an absolute measurement of the Cu {ital K}-shell impact ionization cross section by 5.1-GeV electrons, which demonstrates directly a density effect predicted by Fermi in 1940. By determining the ratio of the {ital K} x-ray yield from a thin front and back layer of the target by a novel grazing emission method, we have verified the effect of transition radiation on the x-ray production, suggested by Sorensen and reported by Bak {ital et} {ital al}. |
Databáze: | OpenAIRE |
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