skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Relativistic distorted-wave collision strengths for Ba/sup 46+/

Abstract

Relativistic distorted-wave electron-collision strengths have been calculated for transitions from the ground state to the 36 n = 3 excited states of neonlike barium. These theoretical results are compared with recent experimental results obtained with the Electron Beam Ion Trap (EBIT) at Lawrence Livermore National Laboratory. Overall good agreement between our calculated results and the experimental results underscores the effectiveness of the new EBIT method for measuring electron-collision cross sections and supports confidence in the theoretical methods used to calculate these cross sections for highly charged ions.

Authors:
Publication Date:
Research Org.:
High Temperature Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550
OSTI Identifier:
5476309
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. A; (United States); Journal Volume: 37:5
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; BARIUM IONS; ELECTRON-ION COLLISIONS; CROSS SECTIONS; DISTORTED WAVE THEORY; EINSTEIN COEFFICIENTS; EXCITATION; MULTICHARGED IONS; THEORETICAL DATA; CHARGED PARTICLES; COLLISIONS; DATA; ELECTRON COLLISIONS; ENERGY-LEVEL TRANSITIONS; INFORMATION; ION COLLISIONS; IONS; NUMERICAL DATA; 640304* - Atomic, Molecular & Chemical Physics- Collision Phenomena

Citation Formats

Reed, K.J.. Relativistic distorted-wave collision strengths for Ba/sup 46+/. United States: N. p., 1988. Web. doi:10.1103/PhysRevA.37.1791.
Reed, K.J.. Relativistic distorted-wave collision strengths for Ba/sup 46+/. United States. doi:10.1103/PhysRevA.37.1791.
Reed, K.J.. Tue . "Relativistic distorted-wave collision strengths for Ba/sup 46+/". United States. doi:10.1103/PhysRevA.37.1791.
@article{osti_5476309,
title = {Relativistic distorted-wave collision strengths for Ba/sup 46+/},
author = {Reed, K.J.},
abstractNote = {Relativistic distorted-wave electron-collision strengths have been calculated for transitions from the ground state to the 36 n = 3 excited states of neonlike barium. These theoretical results are compared with recent experimental results obtained with the Electron Beam Ion Trap (EBIT) at Lawrence Livermore National Laboratory. Overall good agreement between our calculated results and the experimental results underscores the effectiveness of the new EBIT method for measuring electron-collision cross sections and supports confidence in the theoretical methods used to calculate these cross sections for highly charged ions.},
doi = {10.1103/PhysRevA.37.1791},
journal = {Phys. Rev. A; (United States)},
number = ,
volume = 37:5,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 1988},
month = {Tue Mar 01 00:00:00 EST 1988}
}
  • Relativistic distorted-wave collision strengths have been calculated for the over 4000 n = 2 - n = 3 transitions in the 46 C-like ions with nuclear charge number Z in the range 9 {le} Z {le} 54, but in the interest of brevity the results are given here for only the three values Z = 12, 26, and 54. The calculations were made for the six final, or scattered, electron energies E{prime} = 0.008, 0.04, 0.12, 0.28, 0.60, and 1.20, where E{prime} is in units of Z{sub eff}{sup 2} rydbergs with Z{sub eff} = Z {minus} 4.17. In addition, themore » transition energies and electric dipole oscillator strengths are given. To the authors knowledge the present work is the first publication of the results of fully relativistic calculations of the collision strengths for excitation of highly charged C-like ions to the n = 3 levels. 25 refs., 6 tabs.« less
  • Relativistic distorted-wave collision strengths have been calculated for the 105 {Delta}n = 0 transitions with n = 2 in the 81 N-like ions with nuclear charge number Z in the range 12 {le} Z {le} 92. The calculations were made for the six final, or scattered, electron energies E{prime} = 0.03, 0.08, 0.20, 0.42, 0.80, and 1.40, where E{prime} is in units of Z{sub eff}{sup 2} Ry with Z{sub eff} = Z {minus} 5. In addition, the transition energies and electric dipole oscillator strengths are given. To their knowledge the present work is the first comprehensive publication of the resultsmore » of fully relativistic calculations of the collision strengths for excitation of highly charged N-like ions.« less
  • Relativistic distorted-wave collision strengths are given for the 248 possible transitions from the ground level to the excited levels with n = 4 and 5 in the 33 Ni-like ions with nuclear charge number Z in the range 60 {much lt} Z {much lt} 92. The calculations were made for the six final, or scattered, electron energies E{prime} = 0.002, 0.01, 0.03, 0.07, 0.15, and 0.28, where E{prime} is in units of Z{sub eff}{sup 2} rydbergs with Z{sub eff} = Z {minus} 22.5. In addition, the transition energies and electric dipole oscillator strengths are given. To the authors knowledge themore » present work is the first comprehensive publication of the results of fully relativistic calculations of the collision strengths for excitation of highly charged Ni-like ions.« less
  • Relativistic distorted-wave collision strengths have been calculated for the three transitions among the three levels with a hole in the n = 2 shell and for the 327 transitions from these levels to the excited levels with two holes in the n = 2 shell and one electron in the n = 3 shell in all the 71 F-like ions with nuclear charge number Z in the range 22 {le} Z {le} 92. The results are given here for a sample of 18 values of Z. The calculations were made for the six final, or scattered, electron energies E{prime} =more » 0.008, 0.04, 0.10, 0.21, 0.41, and 0.75, where E{prime} is in units of Z{sub eff}{sup 2} rydbergs with Z{sub eff} = Z {minus}6.667. In addition, the transition energies and electric dipole oscillator strengths are given. To the authors knowledge the present work is the first comprehensive publication of the results of fully relativistic calculations of the collision strengths for excitation of F-like ions.« less
  • Relativistic distorted wave collision strengths are given for the 3 transitions among the 2s{sub 1/2}, 2p{sub 1/2}, and 2p{sub 3/2} levels and for the 63 transitions from these levels to the excited levels nlj with n = 3, 4, and 5 in the 85 Li-like ions with nuclear charge number Z in the range 8 {le} Z {le} 92. The calculations were made for the six final, or scattered, electron energies E{prime} = 0.008, 0.04, 0.10, 0.21, 0.41, and 0.75, where E{prime} is in units of Z{sup 2}{sub eff} rydbergs with Z{sub eff} = Z - 1.66. In addition, themore » transition energies and electric dipole oscillator strengths are given. To their knowledge the present work is the first comprehensive publication of the results of fully relativistic calculations of the collision strengths for excitation of Li-like ions.« less