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

Description:

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

Creator(s):
Creation Date: November 1983
Partner(s):
UNT College of Arts and Sciences
Collection(s):
UNT Scholarly Works
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Creator (Author):
Mehta, R.

University of North Texas

Creator (Author):
Duggan, Jerome L.

University of North Texas

Creator (Author):
Creator (Author):
Andrews, M. C.

University of North Texas

Creator (Author):
Lapicki, Gregory

East Carolina University

Creator (Author):
Miller, P. D.

Oak Ridge National Laboratory

Creator (Author):
Rayburn, L. A.

University of Texas at Arlington

Creator (Author):
Zander, A. R.

East Texas State University

Publisher Info:
Publisher Name: American Physical Society
Place of Publication: [College Park, Maryland]
Date(s):
  • Creation: November 1983
Description:

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

Degree:
Department: Physics
Note:

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

Note:

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.

Physical Description:

5 p.

Language(s):
Subject(s):
Keyword(s): M-shell | x-ray production | fluorine ions
Source: Physical Review A, 1983, College Park: American Physical Society, pp. 2722-2726
Partner:
UNT College of Arts and Sciences
Collection:
UNT Scholarly Works
Identifier:
  • DOI: 10.1103/PhysRevA.28.2722 |
  • ARK: ark:/67531/metadc139488
Resource Type: Article
Format: Text
Rights:
Access: Public
Citation:
Publication Title: Physical Review A
Volume: 28
Issue: 5
Page Start: 2722
Page End: 2726
Peer Reviewed: Yes