Investigation of the ground-state spin inversion in the neutron-rich 47,49Cl isotopes

B. D. Linh, Alessandra Corsi, A. Gillibert, A. Obertelli, P. Doornenbal,Carlo Barbieri,Si-Ge Chen, L. X. Chung,Thomas Duguet, M. Gómez-Ramos,Jason D. Holt, A. Moro,Petr Navrátil,Kazuyuki Ogata, N. T. T. Phuc, N. Shimizu, V. Somà,Yutaka Utsuno,N. L. Achouri, H. Baba, F. Browne, D. Calvet, F. Château,Nobuyuki Chiga, M. L. Cortés, A. Delbart,J. M. Gheller, A. Giganon, C. Hilaire, T. Isobe, T. Kobayashi,Yuya Kubota, V. Lapoux, H. N. Liu, T. Motobayashi, I. Murray,Hideaki Otsu, V. Panin, N. Paul, W. Rodriguez,Hiroyoshi Sakurai,Masaki Sasano,David Steppenbeck, L. Stuhl,Y. L. Sun,Yasuhiro Togano,Tomohiro Uesaka,Kathrin Wimmer, K. Yoneda, O. Aktas,Thomas Aumann,F. Flavigny, S. Franchoo,Igor Gašparić,R.-B. Gerst,Julien Gibelin,K. I. Hahn, N. T. Khai,Dong-Wook Kim, T. Koiwai,Yosuke Kondo, P. Koseoglou,Jenny Lee, C. Lehr, T. Lokotko, M. MacCormick, K. Moschner,Takashi Nakamura,S. Y. Park,D. M. Rossi, E. Sahin,Dóra Sohler,P. A. Söderström,Satoshi Takeuchi, N. D. Ton, H. Törnqvist,Victor Vaquero,V. Wagner,H. Wang, V. Werner, X. X. Xu, Y. Yamada, Duo Yan,Zaihong Yang,Masahiro Yasuda, L. Zanetti

arXiv: Nuclear Experiment（2021）

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摘要

A first gamma-ray study of 47,49Cl spectroscopy was performed at the Radioactive Isotope Beam Factory with 50Ar projectiles at 217 MeV/nucleon, impinging on the liquid hydrogen target of the MINOS device. Prompt de-excitation gamma-rays were measured with the NaI(Tl) array DALI2+. Through the one-proton knockout reaction 50Ar(p,2p), a spin assignment could be determined for the low-lying states of 49Cl from the momentum distribution obtained with the SAMURAI spectrometer. A spin-parity J = 3/2+ is deduced for the ground state of 49Cl, similar to the recently studied N = 32 isotope 51K.

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