Measurements of the Longitudinal Electron Polarization in Nuclear Beta-Decay

  • R. Gauder
  • O. Boslau
  • A. Hilscher
  • K.-W. Hoffmann
  • J. Kayser
  • E. Speller
  • U. Zierer
Conference paper

Abstract

One important consequence of the maximum violation of parity in nuclear ß-decay and the pure V-A-interaction is the resulting longitudinal polarization P of the emitted electrons with P = -v/c. Deviations from this value can be caused by:
  1. a.)

    the mechanism of the weak interaction itself (non-maximum violation of parity, Fierz-interference etc.),

     
  2. b.)

    nuclear structure — and renormalization effects (admixtures of the strong interaction).

     
According to b.) measurements of the longitudinal polarization of β-decay electrons can yield information about the magnitude of these effects (described by form-factors) and in conjunction with a proper nuclear model about the β-matrix elements. In contrast to measurements for a.) which have to be absolute our measurements concerning b.) could be done relative to the well-known transition of 60Co. Keeping in mind the relativeness of our results one can, however, deduce values for Fierz-interference or contributions from right-handed currents for different types of β-transitions.

Literature references

  1. 1:.
    J. van Klinken: Nucl. Phys. 75, 145 (1966)CrossRefGoogle Scholar
  2. 2:.
    J. Kessler: Polarized Electrons (Springer, Berlin, Heidelberg, New York 1985)Google Scholar
  3. 3:.
    A.I. Boothroyd et al.: Phys. Rev. C 29 603 (1984)ADSCrossRefGoogle Scholar
  4. 4:.
    B. Mühlschlegel: Z. Phys. 155, 69 (1959)ADSMATHCrossRefGoogle Scholar
  5. 5:.
    N. Ryu: Memoirs of the Faculty of Engineering Hiroshima University, Vol. 5, No. 3 (1975)Google Scholar
  6. 6:.
    H. Hasai: J. Phys. Soc. Jpn 47, 9 (1979)ADSCrossRefGoogle Scholar
  7. 7:.
    H. Behrens, W. Bühring: Electron Radial Wave Functions and Nuclear Beta-Decay/(Int. Series of Monographs on Physics 67, Clarendon Press, Oxford 1982)Google Scholar
  8. 8:.
    J. van Klinken, F.W. Koks, H. Behrens: Phys. Letters 79B, 199 (1978)ADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • R. Gauder
    • 1
  • O. Boslau
    • 1
  • A. Hilscher
    • 1
  • K.-W. Hoffmann
    • 1
  • J. Kayser
    • 1
  • E. Speller
    • 1
  • U. Zierer
    • 1
  1. 1.Institut für StrahlenphysikStuttgart 80F. R. Germany

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