Abstract
The fast-beam-spectroscopy is used for cascade-free high-precision lifetime measurements of highly excited atomic states, which are populated by a two-stage excitation as resulting from gas cell and laser interactions. An experimental extension of the method is presented demonstrating the selective population of high lying levels even from shorter-living intermediate states by an intracavity dye-laser excitation. A first example for this type of experiments is given for the lifetime of the Li 3d 2 D level, which was determined to be τ(32 D)=14.60±0.13 ns. The appropriate experimental set-up is described in detail and an approximate expression for signal calculation is presented, by which the applicability of this method to other levels can be estimated.
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The support of the Deutsche Forschungsgemeinschaft is gratefully acknowledged.
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Schulze-Hagenest, D., Harde, H., Brand, W. et al. Fast-beam-spectroscopy by combined gas cell-laser excitation for cascade-free lifetime measurements of highly excited states. Z Physik A 282, 149–156 (1977). https://doi.org/10.1007/BF01408157
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DOI: https://doi.org/10.1007/BF01408157