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  • 1
    Electronic Resource
    Electronic Resource
    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
    Keywords: 21.10.Ky ; 76.50.Jx ; 76.80.+ y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291188
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  • 2
    Electronic Resource
    Electronic Resource
    Inorganic biochemistry with short-lived radioisotopes as nuclear probes (2000)
    Springer
    Hyperfine interactions 129 (2000), S. 511-527 
    Details
    ISSN: 1572-9540
    Keywords: γ-spectroscopy ; nuclear quadrupole interaction (NQI) ; time differential perturbed angular correlation (TDPAC) ; metalloproteins ; metalloenzymes ; enzymatic detoxification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Metal ions are ubiquitous in the biosphere. In living organisms metalloproteins with specifically designed metal cores perform vital chemical processes. On the other hand, several heavy metals are detrimental to living organisms and nature has developed effective enzymatic detoxification systems which convert toxic metal ions to less toxic species. The nuclear spectroscopy technique Time Differential Perturbed Angular Correlation (TDPAC) of γ-rays uses radioactive isotopes as nuclear probes in these metal cores to obtain a better understanding of the structural and functional significance of these metal cores by monitoring the nuclear quadrupole interaction of the TDPAC probe. Since this technique is based on the nuclear decay, it is also applicable under physiological conditions, i.e., especially at picomolar concentrations. For these studies an indispensable prerequisite is the production of the TDPAC probes with highest possible specific activity and purity as is done by the on-line mass separator ISOLDE at CERN in Geneva.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012646808055
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    Paper (German National Licenses)
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