Abstract

The optogalvanic spectrum of lutetium in the 5650–6250-Å wavelength range was studied with a cw dye laser and a hollow-cathode lamp. The relative intensities of the observed spectral lines and the classification for some of the new transitions of Lu i are reported. With a single-frequency dye laser as the excitation source in the optogalvanic detection setup, the hyperfine structure of many excited levels of 175Lu were investigated, and the corresponding hyperfine coupling constants were measured. The hyperfine coupling constants of the 37 193.98-,37 742.56-, and 39 279.48-cm−1 levels of the 5d6s7s even configuration, the 36 952.93-cm−1 level of the 6s27d even configuration, and the 43 514.29-cm−1 level of the 6s225p odd configuration are reported here. For other configurations studied, the present results are compared with the theoretical and experimental values available in the literature.

© 1989 Optical Society of America

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