Extension of the N=40 Island of Inversion towards N=50: Spectroscopy of Cr66, Fe70,72
- Santamaria, C.
- Louchart, C.
- Obertelli, A.
- Werner, V.
- Doornenbal, P.
- Nowacki, F.
- 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.
- 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.
- Browne, F.
- Chung, L. X.
- Dombradi, Zs.
- Franchoo, S.
- Giacoppo, F.
- Gottardo, A.
- Hadynska-Klek, K.
- Korkulu, Z.
- Koyama, S.
- Kubota, Y.
- Lee, J.
- Lettmann, M.
- Lozeva, Radomira
- Matsui, K.
- Miyazaki, T.
- Nishimura, S.
- Olivier, L.
- Ota, S.
- Patel, Z.
- Pietralla, N.
- Sahin, E.
- Shand, C.
- Söderström, P.-A.
- Stefan, I.
- Steppenbeck, D.
- Sumikama, T.
- Suzuki, D.
- Vajta, Zs.
- Wu, J.
- Xu, Z.
DOIAbstract
International audienceWe report on the measurement of the first 2+ and 4+ states of Cr66 and Fe70,72 via in-beam γ-ray spectroscopy. The nuclei of interest were produced by (p,2p) reactions at incident energies of 260 MeV/nucleon. The experiment was performed at the Radioactive Isotope Beam Factory, RIKEN, using the DALI 2γ-ray detector array and the novel MINOS device, a thick liquid hydrogen target combined with a vertex tracker. A low-energy plateau of 2+1 and 4+1 energies as a function of the neutron number was observed for N≥38 and N≥40 for even-even Cr and Fe isotopes, respectively. State-of-the-art shell model calculations with a modified Lenzi-Nowacki-Poves-Sieja (LNPS) interaction in the pfg9/2d5/2 valence space reproduce the obse...
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