The Renormalization of the Axial-Vector Strength in Nuclei: Experiments on Superallowed Beta-Decay

  • B. Jonson
  • M. J. G. Borge
  • P. G. Hansen
  • S. Mattsson
  • G. Nyman
  • A. Richter
  • K. Riisager
Conference paper

Abstract

It is known that the empirical coupling constant g<Stack><Subscript>A</Subscript><Superscript>′</Superscript></Stack> characterizing the axial-vector (or, Gamow-Teller) strength in nuclear beta-decay is reduced relative to the free-nucleon value gA determined from the neutron decay. This reduction, which was first estimated by WILKINSON [1], arises largely from pionic contributions and hence is one of the examples of sub-nucleonic effects in nuclear physics. Very approximately one may say that one part of the effect comes from virtual hole-delta pairs and another part from second-order core polarization brought about by the tensor force, which itself is predominantly due to one-pion exchange. Papers dealing with these problems, and references to earlier work, can be found in publication [2].

Keywords

Argon Summing 

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References

  1. [1]
    D.H. Wilkinson: Phys. Rev. C7, 930 (1973)MathSciNetADSCrossRefGoogle Scholar
  2. [1a]
    D.H. Wilkinson: Nucl. Phys. A209, 470 (1973)CrossRefGoogle Scholar
  3. [2]
    D.H. Wilkinson: Progr. Part. Nucl. Phys. 11, 1–618 (1983)ADSCrossRefGoogle Scholar
  4. [3]
    C. Gaarde in: Nuclear Structure 1985, eds. R. Broglia et al., (North-Holland, Amsterdam, 1985), p. 449Google Scholar
  5. [4]
    T. Bjørnstad et al.: Nucl. Phys. A433, 283 (1985)Google Scholar
  6. [5]
    E. Hagberg et al.: Phys. Rev. Lett. 49, 792 (1977)ADSCrossRefGoogle Scholar
  7. [6]
    T. Bjørnstad et al.: Methods for production of intense beams of unstable nuclei: new developments at ISOLDE, to be published in Physica ScriptaGoogle Scholar
  8. [7]
    M.J.G. Borge et al.: The decay of 3′3Ar, in preparationGoogle Scholar
  9. [8]
    J.C. Hardy et al.: Phys. Rev. C3, 700 (1971).ADSGoogle Scholar
  10. [9]
    W. Müller, B.C. Metsch, W. Knüpfer and A. Richter: Nucl. Phys. A430, 61 (1984)CrossRefGoogle Scholar
  11. [10]
    B.A. Brown and B.H. Wildenthal, Atomic and Nucl. Data Tables 33, 347 (1985)ADSCrossRefGoogle Scholar
  12. [11]
    H.S. Wilson et al.: Phys. Rev. C22, 1696 (1980)ADSGoogle Scholar
  13. [12]
    J.C. Hardy et al.: Nucl. Phys. A223, 157(1974)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • B. Jonson
    • 1
  • M. J. G. Borge
    • 2
  • P. G. Hansen
    • 2
    • 3
  • S. Mattsson
    • 1
  • G. Nyman
    • 1
  • A. Richter
    • 4
  • K. Riisager
    • 3
  1. 1.Dept. of PhysicsChalmers University of TechnologyGöteborgSweden
  2. 2.EP DivisionCERNGeneva 23Switzerland
  3. 3.Institute of PhysicsUniversity of AarhusAarhus CDenmark
  4. 4.Institut für KernphysikTHDarmstadtF. R. Germany

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