Keywords

atomic data, ISM, abundances, ultraviolet, interstellar

Abstract

New absolute atomic transition probability measurements are reported for 12 transitions in Cr II and two transitions in Zn II. These transition probabilities are determined by combining branching ratios measured by classical techniques and radiative lifetimes measured by time-resolved laser-induced fluorescence. The measurements are compared with branching fractions, radiative lifetimes, and transition probabilities in the literature. The 206 nm resonance multiplets in Cr II and Zn II are included in this work. These multiplets are very useful in determining the distribution of the elements in the gas versus grain phases in the interstellar medium.

Original Publication Citation

S. D. Bergeson and J. E. Lawler. Radiative lifetimes, branching rations, and absolute transition probabilities in CR II and Zn II. Astrophys. J. 408 (1), 382-388 (1993).

Document Type

Peer-Reviewed Article

Publication Date

1993

Publisher

American Astronomical Society

Language

English

College

Physical and Mathematical Sciences

Department

Physics and Astronomy

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