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Article
Report number	arXiv:2306.16189
Title	Intruder configurations in $^{29}$Ne at the transition into the island of inversion: Detailed structure study of $^{28}$Ne
Related title	Intruder configurations in 29Ne at the transition into the island of inversion: Detailed structure study of 28Ne
Author(s)	Wang, H. (RIKEN (main)) ; Yasuda, M. (Tokyo Inst. Tech.) ; Kondo, Y. (Tokyo Inst. Tech.) ; Nakamura, T. (Tokyo Inst. Tech.) ; Tostevin, J.A. (Tokyo Inst. Tech. ; Surrey U.) ; Ogata, K. (Kyushu U., Fukuoka (main) ; Osaka U., Res. Ctr. Nucl. Phys.) ; Otsuka, T. (CERN ; Nishina Ctr., RIKEN) ; Poves, A. (Madrid, Autonoma U.) ; Shimizu, N. (Tsukuba U.) ; Yoshida, K. (JAEA, Ibaraki) ; Achouri, N.L. (LPC, Caen) ; Falou, H. Al (Lebanese U.) ; Atar, L. (Darmstadt, Tech. U.) ; Aumann, T. (Darmstadt, Tech. U. ; Darmstadt, GSI) ; Baba, H. (Nishina Ctr., RIKEN) ; Boretzky, K. (Darmstadt, GSI) ; Caesar, C. (Darmstadt, GSI) ; Calvet, D. (IRFU, Saclay) ; Chae, H. (IBS, Daejeon) ; Chiga, N. (Nishina Ctr., RIKEN) ; Corsi, A. (IRFU, Saclay) ; Crawford, H.L. (LBNL, NSD) ; Delaunay, F. (LPC, Caen) ; Delbart, A. (IRFU, Saclay) ; Deshayes, Q. (LPC, Caen) ; Dombrádi, Zs. (MTA-DE, Debrecen) ; Douma, C. (Groningen, KVI) ; Elekes, Z. (MTA-DE, Debrecen) ; Fallon, P. (LBNL, NSD) ; Gašparić, I. (Boskovic Inst., Zagreb ; Darmstadt, GSI) ; Gheller, J.-M. (IRFU, Saclay) ; Gibelin, J. (LPC, Caen) ; Gillibert, A. (IRFU, Saclay) ; Harakeh, M.N. (Groningen, KVI) ; Hirayama, A. (Tokyo Inst. Tech.) ; Hoffman, C.R. (Argonne, PHY) ; Holl, M. (Darmstadt, Tech. U.) ; Horvat, A. (Darmstadt, Tech. U.) ; Horváth, Á. (Eotvos U.) ; Hwang, J.W. (IBS, Daejeon) ; Isobe, T. (Nishina Ctr., RIKEN) ; Kahlbow, J. (Darmstadt, Tech. U.) ; Kalantar-Nayestanaki, N. (Groningen, KVI) ; Kawase, S. (Kyushu U.) ; Kim, S. (IBS, Daejeon) ; Kisamori, K. (Nishina Ctr., RIKEN) ; Kobayashi, T. (Tohoku U.) ; Körper, D. (Darmstadt, GSI) ; Koyama, S. (CERN) ; Kuti, I. (MTA-DE, Debrecen) ; Lapoux, V. (IRFU, Saclay) ; Lindberg, S. (Chalmers U. Tech.) ; Marqués, F.M. (LPC, Caen) ; Masuoka, S. (Tokyo U., CNS, Saitama) ; Mayer, J. (Cologne U.) ; Miki, K. (Michigan State U.) ; Murakami, T. (Kyoto U.) ; Najafi, M.A. (Groningen, KVI) ; Nakano, K. (Kyushu U.) ; Nakatsuka, N. (Kyoto U.) ; Nilsson, T. (Chalmers U. Tech.) ; Obertelli, A. (IRFU, Saclay) ; Orr, N.A. (LPC, Caen) ; Otsu, H. (Nishina Ctr., RIKEN) ; Ozaki, T. (Tokyo Inst. Tech.) ; Panin, V. (Nishina Ctr., RIKEN) ; Paschalis, S. (Darmstadt, Tech. U.) ; Revel, A. (GANIL ; LPC, Caen ; IRFU, Saclay) ; Rossi, D. (Darmstadt, Tech. U. ; Darmstadt, GSI) ; Saito, A.T. (Tokyo Inst. Tech.) ; Saito, T. (CERN) ; Sasano, M. (Nishina Ctr., RIKEN) ; Sato, H. (Nishina Ctr., RIKEN) ; Satou, Y. (Seoul Natl. U.) ; Scheit, H. (Darmstadt, Tech. U.) ; Schindler, F. (Darmstadt, Tech. U.) ; Schrock, P. (Tokyo U., CNS, Saitama) ; Shikata, M. (Tokyo Inst. Tech.) ; Shimizu, Y. (Nishina Ctr., RIKEN) ; Simon, H. (Darmstadt, GSI) ; Sohler, D. (MTA-DE, Debrecen) ; Sorlin, O. (GANIL) ; Stuhl, L. (IBS, Daejeon ; Nishina Ctr., RIKEN) ; Takeuchi, S. (Tokyo Inst. Tech.) ; Tanaka, M. (Osaka U.) ; Thoennessen, M. (Michigan State U.) ; Törnqvist, H. (Darmstadt, Tech. U. ; Darmstadt, GSI) ; Togano, Y. (Tokyo Inst. Tech.) ; Tomai, T. (Tokyo Inst. Tech.) ; Tscheuschner, J. (Darmstadt, Tech. U.) ; Tsubota, J. (Tokyo Inst. Tech.) ; Uesaka, T. (Nishina Ctr., RIKEN) ; Yang, Z. (Nishina Ctr., RIKEN) ; Yoneda, K. (Nishina Ctr., RIKEN)
Publication	2023-06-20
Imprint	2023-06-28
Number of pages	11
In:	Phys. Lett. B 843 (2023) 138038
DOI	10.1016/j.physletb.2023.138038 (publication)
Subject category	nucl-th ; Nuclear Physics - Theory ; nucl-ex ; Nuclear Physics - Experiment
Abstract	Detailed $\gamma$-ray spectroscopy of the exotic neon isotope $^{28}$Ne has been performed for the first time using the one-neutron removal reaction from $^{29}$Ne 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 $^{28}$Ne 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 $p$-wave and small $f$-wave strength observed experimentally, indicating an ongoing challenge for a complete theoretical description of the transition into the island of inversion along the Ne isotopic chain.
Copyright/License	preprint: (License: CC BY 4.0) publication: © 2023 The Author(s). Published by Elsevier B.V. (License: CC BY 4.0), sponsored by SCOAP³

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