Abstract
The nuclear Larmor precession has been observed for the 2+, 4+ and 6+ rotational states of184W in the hyperfine field of WFe by application of the TDPAC and the IPAC techniques. A carrier free radioactive source of184mRe alloyed with high purity iron was used for all three measurements. From the Larmor precession observed in the 2+ state by TDPACω L = 944(15) MHz and the knowng-factor the hyperfine fieldB hf300 K (WFe)=−69.6(27)T was derived. The deviation from the result of a spin echo experiment with183WFe extrapolated to room temperature may be caused by the Bohr-Weisskopf effect (hyperfine anomaly). IPAC measurements with the same sample polarized in an external magnetic field of 1.6T gave for the 4+ and 6+ rotational states: ω L τ(4+)=0.0609(22) andω L τ(6+)=0.00735(102). By use of experimentalB(E2)-values theg R -factors were derived asg R (4+)=+0.276(26) andg R (6+)=+0.281(45). The directional correlation of the 537−384 keVγ-γ cascade has been analysed in terms of anE1/M2/E3 mixture for theK-forbidden 537keV transition. We obtained the mixing ratiosδ(M2/E1)=±0.086(16),δ(E3/E1)=−0.028(5) with the sign convention of Krane and Steffen.
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We gratefully acknowledge the generous financial support by the Bundesministerium für Forschung und Technologie. One of the authors (H.M.) is indebted to the Atomenergiebehörde Wien and to the Deutsche Forschungsgemeinschaft for a fellowship. The numerical calculations were performed on the IBM computer of the Hochschulrechenzentrum der Universität Bonn.
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Alzner, A., Bodenstedt, E., Herrmann, C. et al. Gyromagnetic ratios of the 4+ and 6+ rotational states of184W. Z Physik A 305, 157–166 (1982). https://doi.org/10.1007/BF01415023
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DOI: https://doi.org/10.1007/BF01415023