Gamow-teller strength distributions in Sc48 by the Ca48(p,n) and Ti48(n,p) reactions and two-neutrino double-β decay nuclear matrix elements

K. Yako, M. Sasano, K. Miki, H. Sakai, M. Dozono, D. Frekers, M. B. Greenfield, K. Hatanaka, E. Ihara, M. Kato, T. Kawabata, H. Kuboki, Y. Maeda, H. Matsubara, K. Muto, S. Noji, H. Okamura, T. H. Okabe, S. Sakaguchi, Y. SakemiY. Sasamoto, K. Sekiguchi, Y. Shimizu, K. Suda, Y. Tameshige, A. Tamii, T. Uesaka, T. Wakasa, H. Zheng

研究成果: Contribution to journalArticle査読

78 被引用数 (Scopus)

抄録

The double-differential cross sections for the Ca48(p,n) and Ti48(n,p) reactions were measured at 300MeV. A multipole decomposition technique was applied to the spectra to extract the Gamow-Teller (GT) components. The integrated GT strengths up to an excitation energy of 30MeV in Sc48 are 15.3±2.2 and 2.8±0.3 in the (p,n) and (n,p) spectra, respectively. In the (n,p) spectra additional GT strengths were found above 8MeV where shell models within the fp shell-model space predict almost no GT strengths, suggesting that the present shell-model description of the nuclear matrix element of the two-neutrino double-β decay is incomplete.

本文言語英語
論文番号012503
ジャーナルPhysical review letters
103
1
DOI
出版ステータス出版済み - 8 6 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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