Direct ionization and electron capture in M-shell x-ray production by fluorine ions

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This article discusses direct ionization and electron capture in M-shell x-ray production by fluorine ions.

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5 p.

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Mehta, R.; Duggan, Jerome L.; McDaniel, Floyd Del. (Floyd Delbert), 1942-; Andrews, M. C.; Lapicki, Gregory; Miller, P. D. et al. November 1983.

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This article discusses direct ionization and electron capture in M-shell x-ray production by fluorine ions.

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5 p.

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Copyright 1983 American Physical Society. The following article appeared in Physical Review A, 28:5, http://link.aps.org/doi/10.1103/PhysRevA.28.2722

Abstract: Measurements of M-shell x-ray production cross sections are reported for thin solid targets of 79Au, 82Pb, 83Bi, and 92U. Fluorine ions of energies 25, 27, and 35 MeV and charge states of 4,5,6,8, and 9 were used. The microscopic cross sections were determined from measurements made with targets ranging in thickness from ~1 to ~300 μg/cm2. An enhancement in the target M-shell x-ray production cross section was observed for fluorine ions with one or two K-shell vacancies over those without a K-shell vacancy. The sums of cross sections for direct ionization to the target continuum and electron capture to the projectile's L,M,N,... shells are inferred from charge state q=4,5,6 data. The first Born calculations overpredict the cross-section data at all energies. Cross sections for electron capture from the target M shell to the projectile K shell for one (q = 8) and two (q = 9) K-shell vacancies in the projectile are also overpredicted by the first Born approximation for electron capture, i.e., the Oppenheimer-Brinkman-Kramers approximation of Nikolaev. The data are in good agreement with the ECPSSR theory of Brandt and Lapicki, which accounts for the energy-loss, Coulomb-deflection, and relativistic effects in the perturbed-stationary-state theory.

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  • Physical Review A, 1983, College Park: American Physical Society, pp. 2722-2726

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  • Publication Title: Physical Review A
  • Volume: 28
  • Issue: 5
  • Page Start: 2722
  • Page End: 2726
  • Peer Reviewed: Yes

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  • November 1983

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  • Feb. 1, 2013, 9:58 a.m.

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  • May 14, 2014, 1:41 p.m.

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Mehta, R.; Duggan, Jerome L.; McDaniel, Floyd Del. (Floyd Delbert), 1942-; Andrews, M. C.; Lapicki, Gregory; Miller, P. D. et al. Direct ionization and electron capture in M-shell x-ray production by fluorine ions, article, November 1983; [College Park, Maryland]. (digital.library.unt.edu/ark:/67531/metadc139488/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.