Laser excitation of rare gas metastables and the resulting fluorescence distribution

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Abstract
Laser excitation spectra have been obtained from metastable states of the rare gas atoms, He, Ne, Ar, Kr, and Xe. The relative population of the atomic metastable states have been obtained several centimeters downstream from a dc discharge source. Dispersion of the laser‐induced fluorescence indicates that relaxation of the excited atomic levels is very extensive at the 1–10 torr pressures used.