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Title: Generalized oscillator strengths for dipole-forbidden transitions in Cu I, Zn II, and Mg II

Abstract

Accurate electron-impact differential cross sections for various optically forbidden transitions in Cu I, Mg II, and Zn II are used to calculate apparent generalized oscillator strengths (GOS's) in the electron-impact energy range 15less than or equal toEless than or equal to100 eV. Most curves of the GOS versus momentum transfer squared, K/sup 2/, appear compatible with the Lassettre-limit theorem. Extrapolation to the optical oscillator strength values is meaningless for the 15-eV curves of Mg II and Zn II for which the unphysical region is significant. The GOS minima, where they exist, near K/sup 2/..-->..0 are extremely important in assessing whether a given transition is interpretable in terms of the Born approximation.

Authors:
;
Publication Date:
Research Org.:
Department of Physics, Atlanta University, Atlanta, Georgia 30314
OSTI Identifier:
5595552
Resource Type:
Journal Article
Journal Name:
Phys. Rev. A; (United States)
Additional Journal Information:
Journal Volume: 37:3
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; COPPER; ELECTRON-ATOM COLLISIONS; OSCILLATOR STRENGTHS; MAGNESIUM IONS; ELECTRON-ION COLLISIONS; ZINC IONS; BORN APPROXIMATION; DIFFERENTIAL CROSS SECTIONS; EMISSION SPECTRA; EV RANGE 10-100; EXCITATION; FORBIDDEN TRANSITIONS; ATOM COLLISIONS; CHARGED PARTICLES; COLLISIONS; CROSS SECTIONS; ELECTRON COLLISIONS; ELEMENTS; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EV RANGE; ION COLLISIONS; IONS; METALS; SPECTRA; TRANSITION ELEMENTS; 640304* - Atomic, Molecular & Chemical Physics- Collision Phenomena

Citation Formats

Msezane, A Z, and Henry, R J.W. Generalized oscillator strengths for dipole-forbidden transitions in Cu I, Zn II, and Mg II. United States: N. p., 1988. Web. doi:10.1103/PhysRevA.37.988.
Msezane, A Z, & Henry, R J.W. Generalized oscillator strengths for dipole-forbidden transitions in Cu I, Zn II, and Mg II. United States. https://doi.org/10.1103/PhysRevA.37.988
Msezane, A Z, and Henry, R J.W. 1988. "Generalized oscillator strengths for dipole-forbidden transitions in Cu I, Zn II, and Mg II". United States. https://doi.org/10.1103/PhysRevA.37.988.
@article{osti_5595552,
title = {Generalized oscillator strengths for dipole-forbidden transitions in Cu I, Zn II, and Mg II},
author = {Msezane, A Z and Henry, R J.W.},
abstractNote = {Accurate electron-impact differential cross sections for various optically forbidden transitions in Cu I, Mg II, and Zn II are used to calculate apparent generalized oscillator strengths (GOS's) in the electron-impact energy range 15less than or equal toEless than or equal to100 eV. Most curves of the GOS versus momentum transfer squared, K/sup 2/, appear compatible with the Lassettre-limit theorem. Extrapolation to the optical oscillator strength values is meaningless for the 15-eV curves of Mg II and Zn II for which the unphysical region is significant. The GOS minima, where they exist, near K/sup 2/..-->..0 are extremely important in assessing whether a given transition is interpretable in terms of the Born approximation.},
doi = {10.1103/PhysRevA.37.988},
url = {https://www.osti.gov/biblio/5595552}, journal = {Phys. Rev. A; (United States)},
number = ,
volume = 37:3,
place = {United States},
year = {1988},
month = {2}
}