₁¹H+ - and ₂⁴He+ - induced M-shell x-ray-production cross sections for selected elements in the rare-earth region

Description:

Article on ₁¹H+ and ₂⁴He+ -induced M-shell x-ray-production cross sections for selected elements in the rare-earth region.

Creator(s):
Creation Date: December 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):
Price, J. L.

University of North Texas

Creator (Author):
Kocur, P. M.

University of North Texas

Creator (Author):
Creator (Author):
Lapicki, Gregory

East Carolina University

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

Article on ₁¹H+ and ₂⁴He+ -induced M-shell x-ray-production cross sections for selected elements in the rare-earth region.

Degree:
Department: Physics
Note:

Copyright 1983 American Physical Society. The following article appeared in Physical Review A, 28:6, http://link.aps.org/doi/10.1103/PhysRevA.28.3217

Note:

Abstract: The measurements of M-shell x-ray-production cross sections induced by ₁¹H+ and ₂⁴He+ ions are compared to the first-Born-approximation and ECPSSR (energy loss, Coulomb-deflection effects; perturbed-stationary-state approximation, with relativistic corrections) theories. Most of the reported experimental data were measured in the authors' laboratory and the other measurements were taken from the literature. The data from the authors' laboratory were for incident H+ and He+ ions in the energy range from 0.25 to 2.5 MeV. The M-shell x-ray-production cross sections were measured for the following thin targets: 59Pr, 60Nd, 63Eu, 64Gd, 66Dy, 67Ho, 68Er, 70Yb, and 72Hf. The data were for the following elements: 54Xe, 59Pr, 60Nd, 62Sm, 63Eu, 64Gd, 65Tb, 66Dy, 67Ho, 68Er, 70Yb, 72Hf, 73Ta, 74W, 78Pt, 79Au, 80Hg, 82Pb, 83Bi, and 92U. The first-born-approximation calculations of the ionization cross section were made using the plane-wave Born approximation for direct ionization and the Oppenheimer-Brinkman-Kramers approximation of Nikolaev for electron capture. The ECPSSR theory of Brandt and Lapicki [Phys. Rev. A 23, 1717 (1981)] goes beyond the first Born approximation and accounts for the energy loss, Coulomb deflection, and relativistic effects in the perturbed-stationary-state theory. The first Born approximation overpredicts all measurements. The ECPSSR theory predicts the M-shell production cross sections correctly for Z2 > 70 and energies per μ > 0.25 MeV/μ. In the rare-earth region the ECPSSR results lie above the data at higher projectile energies and fall off below the data at lower energies.

Physical Description:

6 p.

Language(s):
Subject(s):
Keyword(s): M-shell | x-ray production | ions | ECPSSR theory | rare-earth region
Source: Physical Review A, 1983, College Park: American Physical Society, pp. 3217-3222
Partner:
UNT College of Arts and Sciences
Collection:
UNT Scholarly Works
Identifier:
  • DOI: 10.1103/PhysRevA.28.3217
  • ARK: ark:/67531/metadc139491
Resource Type: Article
Format: Text
Rights:
Access: Public
Citation:
Publication Title: Physical Review A
Volume: 28
Issue: 6
Page Start: 3217
Page End: 3222
Peer Reviewed: Yes