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Calcium and strontium atomic beams are cooled and trapped by using the 1 S 0 - 1 P 1 transition in the 400 nm region. The trapping of 8 isotopes, 40 Ca, 42 Ca, 43 Ca, 44 Ca, 84 Sr, 86 Sr, 87 Sr and 88 Sr, is observed. The decay rate of the trapped atom is found to be of the order of 10 ms and the average atomic velocity less than 1 m/s.
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Kurosu et al. (1990) studied this question.
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