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A system is proposed in which Cs atoms photoionized by soft x rays from a laser-produced plasma undergo selective Auger decay, causing inversion and lasing at 63.8 nm in Cs iii. Rate-equation calculations show that lasing should occur when a small (1-J) 532-nm pump laser is used. A similar system in Rb iii is briefly discussed.
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Walker et al. (1986) studied this question.
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