The Experimental Evidence for Gamow-Teller Quenching
The question of whether there is Gamow-Teller (GT) quenching relates in a fundamental way to our understanding of the nucleus and, thus, has been a subject of discussion for more than a decade.1–6 The question has acquired considerable new interest following the publication of new (p,n) data which allow us to get a view of “complete” GT strength functions7,8—complete in the sense of covering the excitation energy range containing all states with GT strength on the basis of conventional shell model calculations. Although, strictly speaking, GT quenching simply means that less spin-isospin transition strength is observed than is calculated on the basis of some model, the special significance of GT quenching is that it deals with intrinsic nucleon degrees of freedom, and the strength discrepancy violates the very essence of the model rather than fine details of the model.
KeywordsBeta Decay Shell Model Calculation Total Strength Calcium Isotope Quenching Factor
Unable to display preview. Download preview PDF.
- 7.C. D. Goodman, Spivn in: “The (p,n) Reaction and the Nucleon-Nucleon Force,” C. D. Goodman, S. M. Austin, S. D. Bloom, J. Rapaport, and G. R. Satchler, eds., Plenum, New York (1980).Google Scholar
- 8.C. D. Goodman, Nucl. Phys. A374:241C (1982).Google Scholar
- 9.R. J. Blin-Stoyle, Spivn in: “Mesons in Nuclei,” M. Rho and D. H. Wilkinson, eds., North-Holland, Amsterdam (1979), p. 5.Google Scholar
- 14.W. G. Love, private communication.Google Scholar
- 16.D. Kurath, private communication.Google Scholar
- 17.B. H. Wildenthal and W. Chung, Spivn in: “Mesons in Nuclei,” op. cit. Ref. 9, p. 721.Google Scholar
- 18.T. Yamazaki, Spivn in: “Mesons in Nuclei,” op. cit. Ref. 9, p. 651.Google Scholar
- 21.S. D. Bloom and C. D. Goodman, unpublished.Google Scholar
- 22a. S. Cohen and D. Kurath, Nucl. Phys. 89:707 (1966).Google Scholar
- 29.F. Petrovich Spivn in “the (p,n) Reaction and the Nucleon-Nucleon Force” op. cit. Ref. 7, p. 115.Google Scholar
- 30.G. Love Spivn in “The (p,n) Reaction and the Nucleon-Nucleon Force” op. cit. Ref. 7, p. 23.Google Scholar
- 31.This value is the weighted mean of two measurements: H. S. Wilson, R. W. Kavanagh and F. M. Mann, Phys. Rev. C 22:1696 (1980); A. M Hernandez and W. W. Daehnick, Phys. Rev. C 24:2235 (1981).Google Scholar