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Field shifts in hafnium II

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

By means of classical interference spectroscopy, using enriched isotope samples, the isotope shift between178Hf and180Hf has been measured for 33 transitions in the Hf II spectrum. For the pure Russell-Saunders terms 5d 26s 4 F and2 F the parametric analysis yields a field-shift difference of 17(2) mK produced by the second-order interaction of the electrostatic operator and the field-shift operator. Semi-empirical calculations based on the non-relativistic Hartree-Fock method reproduce this value as well as the experimental field shifts if a factor of 1.68(6) is used to scale theab initio electron densities at the nucleus. The corresponding factor for the Hf atom is much smaller. This leads to a re-evaluation of screening ratios for Hf and to a more accurate value of the nuclear parameter λ178,180 (Hf)=0.072(4) fm2.

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Aufmuth, P., Henneberg, I., Siminski, A. et al. Field shifts in hafnium II. Z Phys D - Atoms, Molecules and Clusters 18, 107–112 (1991). https://doi.org/10.1007/BF01418175

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  • DOI: https://doi.org/10.1007/BF01418175

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