Abstract

The laser-atomic-beam spectroscopy has been used to make precise measurements of the hyperfine structure in transitions starting from metastable states of the configuration 4f 125d6s 2 in169TmI. With the resulting experimental magnetic dipole hyperfine constantsA J andA J values from former investigations a parametric analysis of the hyperfine structure in the configurations 4f 136s6p and 4f 125d6s 2 has been performed using wavefunctions from fine structure calculations. A comparison of theoretical and experimental hyperfine constants allowed a test of the reliability of the wave-functions used. The hyperfine parameters respectively hyperfine radial integrals determined from the analysis were compared with corresponding data from ab initio calculations for the ground configuration in TmI.

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