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  • 1
    Digitale Medien
    Digitale Medien
    Measurements of magnetic moments of Tc isotopes and the hyperfine field of Tc in Fe and Ni (1995)
    Springer
    The European physical journal 350 (1995), S. 311-318 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.Ky ; 76.50.Jx ; 76.80.+ y
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report measurements of nuclear magnetic resonance on oriented nuclei (NMR-ON) on94Tc (Iπ=7+,T 1/2=4.9 h),95Tc (I π=9/2+,T 1/2=20 h) and96Tc (I π=7+,T 1/2=4.3 d) in Fe and on95Tc and96Tc in Ni. In order to elucidate the discrepancies on the hyperfine field of TcFe in the literature, the resonances were measured with high precision as a function of the external magnetic field Bext up to 2.0 T. In addition, TDPAC measurements were performed on99TcFe at T=300 K and 13 K. TheT=0 K hyperfine fields of Tc in Fe and Ni were determined to be −314(3) kG and −51.8(5) kG, respectively. The g-factors of93Tc,94Tc,95Tc,96Tc and99Tc(E=181 keV;I π=5/2+) are redetermined as g(93Tc)=1.405(14), g(94Tc)=0.731(7),g(95Tc)=1.321(13), g(96Tc)=0.727(7), g(99Tc)=1.390(17).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01291188
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  • 2
    Digitale Medien
    Digitale Medien
    Confirmation of the giant hyperfine anomaly of the system184W2+-183W g by new spin-echo experiments with183WFe and remarks on possible explanations (1985)
    Springer
    The European physical journal 322 (1985), S. 75-82 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10 ; 27.70+ ; 33.25
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Spin-echo measurements on183W were performed with dilute alloys of W (0.1, 0.25, 0.5 and 1 at %) in Fe. The result for the hyperfine field:B 4.2K hf =(−)62 · 54 (3) T agrees with the old data of Kontani and Itoh, but the accuracy is much better. The giant hyperfine anomaly of183W with respect to184W2+ observed by Alzner et al. is thus confirmed and the errors are reduced to:184W2+Δ183Wg=+0.150(31). This is the first case of a very large hyperfine anomaly in electronic hyperfine fields which is not caused by the pathological cancellation of orbital and spin magnetism in jackknifep 1/2 ord 3/2 single proton configurations. A detailed discussion shows that the large hyperfine anomaly may be related to the anomalously small magnetic dipole moment of183W. Our result should stimulate further theoretical work with the aim to understand this magnetic moment as well as the giant hyperfine anomaly.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01412019
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