Abstract

Laser oscillation has been observed at one hundred and eighteen wavelengths in ionized neon, argon, krypton, xenon, oxygen, and other gases in the spectral range 2677 Å to 7993 Å. Of these lines, ninety-six have been definitely identified, and arise from singly, doubly, and triply ionized atoms. A 2-m, pulsed dc discharge was employed. Measured and calculated wavelengths and level classifications are tabulated. The majority of the laser lines observed are shown by comparison with calculated relative line strengths to be the strong lines predicted by L-S coupling that possess lower levels optically connected to the ion ground state. The rules ΔS = 0, ΔJ = ΔL = +1 are reasonably well obeyed, although violations of L-S restrictions on core change and multiplicity are also observed. Evidence of upper level population by electron collision with ground-state ions is presented. The time dependence of laser output under pulsed excitation is discussed.

© 1965 Optical Society of America

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