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  • 1
    Electronic Resource
    Electronic Resource
    Fundamental weak interaction studies using polarised nuclei and ion traps (2000)
    Springer
    Hyperfine interactions 129 (2000), S. 223-236 
    Details
    ISSN: 1572-9540
    Keywords: nuclear β-decay ; correlations ; right-handed currents ; scalar and tensor currents ; polarized nuclei ; Penning traps
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two experiments to search for new physics beyond the standard model for electroweak interactions by measuring correlations between different spin and momentum vectors in nuclear β-decay are discussed. In the first experiment the correlation between the emission asymmetry and the longitudinal polarisation of positrons emitted by polarised nuclei is determined. This type of measurement is sensitive to the presence of right-handed currents but also to possible scalar and tensor-type currents in the weak interaction. The aim of the second experiment is to determine the βν-correlation in β-decay by measuring the energy spectrum of the recoil ions, using a Penning trap and a retardation spectrometer. In this case the focus is on the search for scalar currents in the weak interaction. The results of the experiments presented here are complementary to results from experiments in muon decay and at high-energy colliders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012665917625
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Alpha-anisotropy studies of near spherical nuclei at ISOLDE (2000)
    Springer
    Hyperfine interactions 129 (2000), S. 163-173 
    Details
    ISSN: 1572-9540
    Keywords: α-decay ; nuclear structure ; nuclear orientation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An extensive on-line nuclear orientation study of the angular distribution in favoured α-decay of Bi, At and Rn nuclei near the Z=82 and N=126 shell closures, performed at ISOLDE is presented. Surprisingly large αanisotropies were observed, showing systematic changes from one isotope to the next. Comparison with various theoretical models proves that anisotropic α-emission in favoured decays of near-spherical nuclei is determined by the structure of the decaying nucleus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012657715807
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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