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Title:
Excitation energies and transition probabilities for the forbidden transitions of helium-like ions
Authors:
Kundu, B.; Mukherjee, P. K.
Affiliation:
AA(Indian Association for the Cultivation of Science, Calcutta, India), AB(Indian Association for the Cultivation of Science, Calcutta, India)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 298, Nov. 15, 1985, p. 844-847. (ApJ Homepage)
Publication Date:
11/1985
Category:
Plasma Physics
Origin:
STI
NASA/STI Keywords:
Atomic Excitations, Atomic Physics, Forbidden Transitions, Helium Ions, Transition Probabilities, Fusion, Ground State, Hartree Approximation, Plasma Physics, Positive Ions
DOI:
10.1086/163667
Bibliographic Code:
1985ApJ...298..844K

Abstract

Excitation energies and transition probabilities for the forbidden transitions 1s2:1S to 1sns:3S (n = 2, 3, 4), have been calculated for a number of helium-like ions: N(5+), O(6+), Ne(8+), Mg(10+), Al(11+), Si(12+), S(14+), Cl(15+), Ar(16+), and Ti(20+), which are of considerable interest in astrophysical observations and in laboratory experiments involving fusion plasmas. Nonrelativistic time-dependent coupled Hartree-Fock theory has been adopted with a simple but effective form of the perturbation operator to induce such excitations. Excitation energies and transition probabilities are in reasonably good agreement with the existing experimental and theoretical data.

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