Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..504k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 1, 1989, p. 504-506.
Astronomy and Astrophysics
Astrophysics
7
Electron Transitions, Helium, Isoelectronic Sequence, Oscillator Strengths, Asymptotes, Electric Dipoles, Wave Functions
Scientific paper
The radial integral for 1s2 1S-1s np 1P transitions of the He
isoelectronic sequence is asymptotically expanded to order n exp -7 to
facilitate calculations of the dipole oscillator strength for large n.
The threshold differential oscillator strength values are obtained for
ions up to Z = 30 within the screened hydrogenic model.
Khan Faisal
Khandelwal Govind S.
Wilson William J.
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