Radiative Lifetimes of uv Multiplets in Boron, Carbon, and Nitrogen
- 7 January 1966
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 141 (1) , 67-70
- https://doi.org/10.1103/physrev.141.67
Abstract
Radiative lifetimes of fourteen of the strongest vacuum uv multiplets in B i, B ii, C i, C ii, N i, and N ii were measured by the phase-shift method with accuracies of 10-20%. All but one are transitions to the ground-state configuration. When necessary the measurements were corrected for the presence of delayed excitation by cascading. Of the transitions reported, eight exhibited cascading. The lifetimes range from 0.9 to 23 nsec. Multiplet transition probabilities determined from the lifetimes are compared with some previous determinations. Excitation was by collision of 200-V electrons with molecules containing the atom under study. The electron current was modulated sinusoidally at frequencies between 0.54 and 54 Mc/sec. The phase shift in the modulation of the emitted light was measured and used to determine the radiative lifetimes.Keywords
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