TY  - JOUR
AU  - Fujita, Y. et al
AU  - Algora, A.
AU  - Estevez-Aguado, E.
AU  - Molina, F.
AU  - Rubio, B.
PY  - 2014
DA  - 2014//
TI  - Observation of Low- and High-Energy Gamow-Teller Phonon Excitations in Nuclei
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 112502
EP  - 5pp
VL  - 112
IS  - 11
PB  - Amer Physical Soc
AB  - 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 (He-3, t) charge-exchange reactions. In the Ca-42 -> Sc-42 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 Fe-54 -> Co-54 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.
SN  - 0031-9007
UR  - https://doi.org/10.1103/PhysRevLett.112.112502
DO  - 10.1103/PhysRevLett.112.112502
LA  - English
N1  - WOS:000332925900009
ID  - Fujita_etal2014
ER  -