1. In-beam γ Spectroscopy of Neutron-rich $^{63,65,67}$Mn
- Author
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Hongyang, Lu, Xiaoyu, Liu, Bing, Ding, Zhong, Liu, Doornenbal, P., Obertelli, A., Lenzi, S.M., Walker, P.M., Chung, L.X., Linh, B.D., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Nowacki, F., Otsu, H., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.Y., Sakurai, H., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Pluridisciplinaire Hubert Curien (IPHC), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
neutron-rich nuclei ,in-beam γ-ray spectroscopy ,shell evolution ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,island of inversion - Abstract
International audience; The excited states in $^{63,65,67}$Mn have been studied via in-beam \begin{document}$\gamma$\end{document}-ray spectroscopy following the knockout reaction of $^{68}$Fe by bombarding a liquid hydrogen target. Similar level schemes have been established for the three isotopes, and the level schemes consist of the 11/2$^{–}$, 9/2$^{–}$, 7/2$^{–}$ and 5/2$_{g.s.}^{–}$ states, which are connected by \begin{document}$\Delta I = 1$\end{document}. The level sequences of $^{65,67}$Mn show features of strongly coupled rotational band with \begin{document}$K^{\pi} = 5/2^{-}$\end{document} expected for the well deformed nuclei. Large-scale shell-model calculations using the modified LNPS (LNPSm) effective interaction reproduce the observed levels remarkably well and suggest the dominance of 4-particle-4-hole (\begin{document}$4p-4h$\end{document}) neutron configurations and 1-particle-1-hole (\begin{document}$1p-1h$\end{document}) proton configurations for all the states. The experimental results show an enhancement of Urca neutrino cooling in the accreted neutron crust associated with \begin{document}$A = 63$\end{document} nuclei and rule out significant cooling from \begin{document}$A = 65,67$\end{document}.
- Published
- 2019