Collectivity of neutron-rich Cr and Fe toward N=50
- Werner, V.
- Santamaria, C.
- Louchart, C.
- Obertelli, A.
- Doornenbal, P.
- Nowacki, F.
- Authelet, G.
- Baba, H.
- Calvet, D.
- Chateau, F.
- Corsi, A.
- Delbart, A.
- Gheller, J.M.
- Gillibert, A.
- Isobe, T.
- Lapoux, V.
- Matsushita, M.
- Momiyama, S.
- Motobayashi, T.
- Niikura, M.
- Otsu, H.
- Peron, C.
- Peyaud, A.
- Pollacco, E. C.
- Rousse, J.Y.
- Sakurai, H.
- Sasano, M.
- Shiga, Y.
- Takeuchi, S.
- Taniuchi, R.
- Uesaka, T.
- Wang, H.
- Yoneda, K.
- Browne, F.
- Chung, L. X.
- Dombradi, Zs.
- Franchoo, S.
- Giacoppo, F.
- Gottardo, A.
- Hadynska-Klek, K.
- Korkulu, Z.
- Koya
DOIAbstract
Within the SEASTAR project at RIKEN-RIBF, Cr-66 and (70.7)2Fe have been produced via proton-knockout reactions, and their first excited 2(+) and 4(+) states have been discovered. The combination of the liquid-hydrogen target and TPC system MINOS has been used in combination with the DALI2 detector array for the first time. A 345 MeV/u U-238 beam with a mean intensity of about 12 pnA impinged on a Be target. Fission fragments were separated and identified using the BigRIPS spectrograph, and reaction products were analyzed using the ZeroDegree spectrograph. A plateau of excitation energies, with a small change in the systematic trends past N = 44, reveals an extension of the N = 40 region of collectivity toward N = 50. Hence, the isotopes of ...
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