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