Abstract

The hyperfine structure of the 22 125-cm−1, 2D3/2°2D3/2 lutetium transition has been examined by both Fourier-transform emission and laser optogalvanic spectroscopy. The component intensities of the Fourier-transform spectrum closely agree with classical intensities. The optogalvanic spectra show progressively larger deviations from classical intensities as the laser power is increased. Introduction of a single optical saturation parameter into the intensity formula is sufficient to fit the observed intensities even at high laser powers. These spectra were used to derive accurate values for the 175Lu line origin, the upper-state hyperfine constants of 175Lu, and the isotope shift between 176Lu and 175Lu.

© 1985 Optical Society of America

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