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A new method is presented for cascade-free high-precision lifetime measurements of highly excited atomic states. Experimental examples are given for the lifetimes of the Ba⁺ 6p ²P3/2 level and the Ne 3p ^'[3/2]₂ level. The experimental arrangement uses a fast ion beam which is excited in a gas cell and, after a definite time of flight, is further excited by a continuous-wave intracavity dye-laser beam. Further possible applications of the method are mentioned.
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Harde et al. (1974) studied this question.
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