Rolf Engleman, Richard A. Keller, and Charles M. Miller, "Effect of optical saturation on hyperfine intensities in optogalvanic spectroscopy," J. Opt. Soc. Am. B 2, 897-902 (1985)
The hyperfine structure of the 22 125-cm−1,
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.
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From Ref. 5. Sum of L(F′, F″) normalized to 1000.
Calculated from Eq. (6). Sum of U(F′, F″) normalized to 1000. equals zero at all laser powers. See Eq. (10).
Absolute OGS origin not accurately determined.
Overall intensity value arbitrary and not of interest.
Assumed values from FTS spectrum. Refs. 11, 14, and 15 gives values of −13.1, −13.6, and −13.9 mK (error of 0.1 mK) for other transitions between the same configurations. Convention is larger mass minus smaller mass, i.e., isotope shift equals T0(176) − T0(175).
Classical intensity model used, i.e., saturation approaching zero.
Varies depending on laser power.
Varies somewhat depending on the scan.
Table 3
Relative Hyperfine Component Positions (inmK) for the
Transition of Lutetium
From Ref. 5. Sum of L(F′, F″) normalized to 1000.
Calculated from Eq. (6). Sum of U(F′, F″) normalized to 1000. equals zero at all laser powers. See Eq. (10).
Absolute OGS origin not accurately determined.
Overall intensity value arbitrary and not of interest.
Assumed values from FTS spectrum. Refs. 11, 14, and 15 gives values of −13.1, −13.6, and −13.9 mK (error of 0.1 mK) for other transitions between the same configurations. Convention is larger mass minus smaller mass, i.e., isotope shift equals T0(176) − T0(175).
Classical intensity model used, i.e., saturation approaching zero.
Varies depending on laser power.
Varies somewhat depending on the scan.
Table 3
Relative Hyperfine Component Positions (inmK) for the
Transition of Lutetium
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