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Determination of radiative lifetimes of neutral sulphur by time-resolved three-photon VUV laser spectroscopy |
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| Authors: | ZS Li A Persson S Svanberg HP Garnir E Biémont |
| Institution: | (1) Department of Physics, Lund Institute of Technology, P.O. Box 118, 221 00 Lund, Sweden, SE;(2) Institut d'Astrophysique, Université de Liège, 5 avenue de Cointe, 4000 Liège, Belgium, BE |
| Abstract: | Radiative lifetimes of the highly exited states s and d of neutral sulphur have been measured using time-resolved laser-induced fluorescence. The sulphur atoms were generated in a laser-produced plasma. The investigated states were populated through a two-step process involving a two-photon excitation to the lowest excited triplet state of even parity , followed by a one-photon excitation to the investigated state. We obtained ns and ns. These values are much longer than theoretically predicted ones and much shorter than those indirectely inferred from astronomical data. Received: 9 February 1998 / Accepted: 24 February 1998 |
| Keywords: | PACS 32 70 Ca Oscillator and band strengths lifetimes transition moments and Franck-Condon factors - 42 62 Fi Laser spectroscopy |
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