RADIATIVE LIFETIMES, BRANCHING RATIOS, AND ABSOLUTE TRANSITION-PROBABILITIES IN CR-II AND ZN-II

被引：97

作者：

BERGESON, SD

LAWLER, JE

机构：

[1] Department of Physics, University of Wisconsin-Madison, Madison

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 408卷 / 01期

关键词：

ATOMIC DATA; ISM; ABUNDANCES; ULTRAVIOLET; INTERSTELLAR;

D O I：

10.1086/172595

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

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页码：382 / 388

页数：7

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