Doppler limited laser spectroscopy on hafnium lines. Part II: Hyperfine structure of odd-parity levels

S. Bouazza; H. O. Behrens; M. Fienhold; J. Dembczynski; G. H. Guthöhrlein

doi:10.1007/s100530050314

EPJ

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2023 Impact factor 1.5

Atomic, Molecular, Optical and Plasma Physics

Eur. Phys. J. D 6, 311-317 (1999)
https://doi.org/10.1007/s100530050314

Doppler limited laser spectroscopy on hafnium lines. Part II: Hyperfine structure of odd-parity levels

S. Bouazza¹, H. O. Behrens², M. Fienhold², J. Dembczynski³ and G. H. Guthöhrlein²

¹ Département de Physique, Faculté des Sciences, B.P. 1039, 51687 Reims cedex, France
² Universität der Bundeswehr Hamburg, Holstenhofweg 85, 22043 Hamburg, Germany
³ Politechnika Poznanska, Katedra Fizyki Atomowej, ul. Piotrowo 3, 60-965 Poznan, Poland

Received: 16 November 1998
Revised: 5 February 1999
Published online: 15 June 1999

Abstract

The hyperfine structure of selected odd-parity levels of the configurations 5d6s ^26p and 5d ^26s6p of $\rm^{177}Hf$ I was studied in 10 lines lying in the red spectral region. Hyperfine spectra were obtained by the method of laser induced fluorescence in the plasma of a liquid nitrogen cooled hollow cathode discharge. The observed hyperfine structure constants A and B, together with results from earlier studies were analyzed by means of a parametric method. The interpretation has been carried out based on a refined multiconfigurational fine structure calculation including the main Rydberg series configurations mutually interacting. The set of fine structure parameters as well as the leading eigenvector percentages of levels relevant for this paper are given. The following single electron hfs parameters were deduced for $\rm^{177}Hf$ : $a^{01}_{5d} = 98.8(0.8) {\rm MHz}$ , $a^{01}_{6p}= 204.6 (6.4) {\rm MHz}$ , $b^{02}_{5d}= 4129 (133) {\rm MHz}$ , $b^{02}_{6p}= 7847(266) {\rm MHz}$ for the lowest configuration.