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We have investigated infrared laser action in the 0.8–2-μ region originating from silver and copper atoms and ions excited in hollow cathode discharges. 34 new laser lines are reported. We also observed eight Ar I and one Xe I infrared laser lines, most of which have been observed previously. The discharge conditions for these transitions and their excitation mechanisms are discussed.
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Solanki et al. (1979) studied this question.
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