Observation of low- and high-energy gamow-teller phonon excitations in nuclei

Y. Fujita, H. Fujita, T. Adachi, C. L. Bai, A. Algora, G. P.A. Berg, P. Von Brentano, G. Colò, M. Csatlós, J. M. Deaven, E. Estevez-Aguado, C. Fransen, D. De Frenne, K. Fujita, E. Ganioǧlu, C. J. Guess, J. Gulyás, K. Hatanaka, K. Hirota, M. HonmaD. Ishikawa, E. Jacobs, A. Krasznahorkay, H. Matsubara, K. Matsuyanagi, R. Meharchand, F. Molina, K. Muto, K. Nakanishi, A. Negret, H. Okamura, H. J. Ong, T. Otsuka, N. Pietralla, G. Perdikakis, L. Popescu, B. Rubio, H. Sagawa, P. Sarriguren, C. Scholl, Y. Shimbara, Y. Shimizu, G. Susoy, T. Suzuki, Y. Tameshige, A. Tamii, J. H. Thies, M. Uchida, T. Wakasa, M. Yosoi, R. G.T. Zegers, K. O. Zell, J. Zenihiro

研究成果: ジャーナルへの寄稿学術論文査読

65 被引用数 (Scopus)

抄録

Gamow-Teller (GT) transitions in atomic nuclei are sensitive to both nuclear shell structure and effective residual interactions. The nuclear GT excitations were studied for the mass number A=42, 46, 50, and 54 "f-shell" nuclei in (He3, t) charge-exchange reactions. In the Ca42→Sc42 reaction, most of the GT strength is concentrated in the lowest excited state at 0.6 MeV, suggesting the existence of a low-energy GT phonon excitation. As A increases, a high-energy GT phonon excitation develops in the 6-11 MeV region. In the Fe54→Co54 reaction, the high-energy GT phonon excitation mainly carries the GT strength. The existence of these two GT phonon excitations are attributed to the 2 fermionic degrees of freedom in nuclei.

本文言語英語
論文番号112502
ジャーナルPhysical Review Letters
112
11
DOI
出版ステータス出版済み - 18-03-2014
外部発表はい

All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般

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