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
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