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 |
| 巻 | 112 |
| 号 | 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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