Intruder configurations in $^{29}$Ne at the transition into the island of inversion: Detailed structure study of $^{28}$Ne
- Wang, H.
- Yasuda, M.
- Kondo, Y.
- Nakamura, T.
- Tostevin, J.A.
- Ogata, K.
- Otsuka, T.
- Poves, A.
- Shimizu, N.
- Yoshida, K.
- Achouri, N.L.
- Falou, H. Al
- Atar, L.
- Aumann, T.
- Baba, H.
- Boretzky, K.
- Caesar, C.
- Calvet, D.
- Chae, H.
- Chiga, N.
- Corsi, A.
- Crawford, H.L.
- Delaunay, F.
- Delbart, A.
- Deshayes, Q.
- Dombrádi, Zs.
- Douma, C.
- Elekes, Z.
- Fallon, P.
- Gašparić, I.
- Gheller, J.-M.
- Gibelin, J.
- Gillibert, A.
- Harakeh, M.N.
- Hirayama, A.
- Hoffman, C.R.
- Holl, M.
- Horvat, A.
- Horváth, Á.
- Hwang, J.W.
- Isobe, T.
- Kahlbow, J.
- Kalantar-Nayestanaki, N.
- Kawase, S.
- Kim, S.
- Kisamori, K.
- Kobayashi, T.
- Körper, D.
- Koyama, S.
- Kuti, I.
- Lapoux, V.
- Lindberg, S.
- Marqués, F.M.
- Masuoka, S.
- Mayer, J.
- Miki, K.
- Murakami, T.
- Najafi, M.A.
- Nakano, K.
- Nakatsuka, N.
- Nilsson, T.
- Obertelli, A.
- Orr, N.A.
- Otsu, H.
- Ozaki, T.
- Panin, V.
- Paschalis, S.
- Revel, A.
- Rossi, D.
- Saito, A.T.
- Saito, T.
- Sasano, M.
- Sato, H.
- Satou, Y.
- Scheit, H.
- Schindler, F.
- Schrock, P.
- Shikata, M.
- Shimizu, Y.
- Simon, H.
- Sohler, D.
- Sorlin, O.
- Stuhl, L.
- Takeuchi, S.
- Tanaka, M.
- Thoennessen, M.
- Törnqvist, H.
- Togano, Y.
- Tomai, T.
- Tscheuschner, J.
- Tsubota, J.
- Uesaka, T.
- Yang, Z.
- Yoneda, K.
DOIAbstract
Detailed γ-ray spectroscopy of the exotic neon isotope 28Ne has been performed for the first time using the one-neutron removal reaction from 29Ne on a liquid hydrogen target at 240 MeV/nucleon. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for 28Ne and the negative-parity states are identified for the first time. The measured partial cross sections and momentum distributions reveal a significant intruder p-wave strength providing evidence of the breakdown of the N=20 and N=28 shell gaps. Only a weak, possible f-wave strength was observed to bound final states. Large-scale shell-model calculations with different effective interactions do not reproduce the large p-wa...
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