Cross sections for L x-ray production and L-subshell ionization by MeV electrons

Journal Article · Wed Oct 01 04:00:00 EDT 1975 · Phys. Rev., A, v. 12, no. 4, pp. 1358-1364

OSTI ID:4149360

Park, Y K; Smith, M T; Scholz, W

A systematic study of L x-ray production and L-subshell ionization by MeV electron impact has been made. Cross sections were measured for 14 elements from Ba (Z = 56) to Bi (Z = 83) at electron bombarding energies of 1.04, 1.39, and 1.76 MeV. Within the error limits there is no dependence on the electron energy. At all energies, measured L x-ray production cross sections exhibit a gradual increase with atomic number. For the heavier elements, typical average values for the L$alpha$, L$beta$, and L$gamma$ group are 70, 55, and 9 b, respectively. L-subshell ionization cross sections were derived from the L$alpha$, L$beta$, and L$gamma$ x-ray production cross sections with the use of theoretical L-subshell fluorescence yields, Coster-Kronig yields, and radiative branching ratios. The total L-shell ionization cross section drops from 1200 b at Ba (Z = 56) to 380 b at Bi (Z = 83) with individual L-subshells contributing roughly in proportion to their electron number. The measured cross sections are in good agreement with the predictions of the binary-encounter collision model of Gryzinski.

• Research Organization: Department of Physics, State University of New York at Albany, Albany, New York 12222
• NSA Number: NSA-33-004022
• OSTI ID: 4149360
• Journal Information: Phys. Rev., A, v. 12, no. 4, pp. 1358-1364, Journal Name: Phys. Rev., A, v. 12, no. 4, pp. 1358-1364; ISSN PLRAA
• Country of Publication: United States
• Language: English

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