%0 Journal Article
%T Observation of Low- and High-Energy Gamow-Teller Phonon Excitations in Nuclei
%A Fujita, Y. et al
%A Algora, A.
%A Estevez-Aguado, E.
%A Molina, F.
%A Rubio, B.
%J Physical Review Letters
%D 2014
%V 112
%N 11
%I Amer Physical Soc
%@ 0031-9007
%G English
%F Fujita_etal2014
%O WOS:000332925900009
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1729), last updated on Thu, 17 Apr 2014 11:11:24 +0000
%X 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.
%R 10.1103/PhysRevLett.112.112502
%U https://doi.org/10.1103/PhysRevLett.112.112502
%P 112502-5pp