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Prog. Theor. Phys. Vol. 38 No. 1 (1967) pp. 107-143

Theory of Hindered Gamow-Teller Matrix Elements

Jun-Ichi Fujita, Yasuhiko Futami^* and Kiyomi Ikeda^**

Institute for Nuclear Study, University of Tokyo, Tokyo
^*Department of Physics, Tokyo University of Education, Tokyo
^**Department of Physics, University of Tokyo, Tokyo

(Received February 24, 1967)

Abstract:

The commutator method which was previously proposed for the purpose of calculating hindered matrix elements is applied to the Gamow-Teller beta matrix elements of heavier nuclei. It is shown that a number of empirical ft-values of the unfavored transitions can be well reproduced in terms of the conventional pairing model without invoking the phenomenological effective coupling constant. It is also shown that the l-forbidden transitions can be treated on the same footing as the unfavored ones. In such a treatment tensor forces play an important role. General forms of the effective single-body transition operators are derived on the basis of the commutator method, and qualitative discussions are given.

URL : http://ptp.ipap.jp/link?PTP/38/107/
DOI : 10.1143/PTP.38.107

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9. Progress of Theoretical Physics Supplement No.60 (1976) pp. 47-55 :

   Hindrance Factors for First-Forbidden Beta Decays of Medium and Heavy Nuclei

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