Onset of collectivity for argon isotopes close to N=32

Linh, BD; Corsi, A; Gillibert, A; Obertelli, A; Doornenbal, P; Barbieri, C; Duguet, T; Gómez-Ramos, M; Holt, JD; Hu, BS; Miyagi, T; Moro, AM; Navrátil, P; Ogata, K; Péru, S; Phuc, NTT; Shimizu, N; Somà, V; Utsuno, Y; Achouri, NL; Baba, H; Browne, F; Calvet, D; Château, F; Chen, S; Chiga, N; Cortés, ML; Delbart, A; Gheller, JM; Giganon, A; Hilaire, C; Isobe, T; Kobayashi, T; Kubota, Y; Lapoux, V; Liu, HN; Motobayashi, T; Murray, I; Otsu, H; Panin, V; Paul, N; Rodriguez, W; Sakurai, H; Sasano, M; Steppenbeck, D; Stuhl, L; Sun, YL; Togano, Y; Uesaka, T; Wimmer, K; Yoneda, K; Aktas, O; Aumann, T; Chung, LX; Flavigny, F; Franchoo, S; Gasparic, I; Gerst, RB; Gibelin, J; Hahn, K; Khai, NT; Kim, D; Koiwai, T; Kondo, Y; Koseoglou, P; Lee, J; Lehr, C; Lokotko, T; Maccormick, M; Moschner, K; Nakamura, T; Park, SY; Rossi, D; Sahin, E; Sohler, D; Söderström, PA; Takeuchi, S; Toernqvist, H; Vaquero, V; Wagner, V; Wang, ST; Werner, V; Xu, X; Yamada, Y; Yan, D; Yang, Z; Yasuda, M; Zanetti, L. (2024) Onset of collectivity for argon isotopes close to N=32. Physical Review C, 109 (3). ISSN 2469-9985

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Abstract

The shell closure at N = 32 has been investigated by a first spectroscopy of the N = 31 nucleus 49Ar at the Radioactive Isotope Beam Factory. Using the 50Ar(p,pn) reaction channel in inverse kinematics, 50Ar projectiles at 217 MeV/nucleon impinged on a 150 mm long liquid hydrogen target, part of the MINOS device. Prompt de-excitation γ rays were measured with the NaI(Tl) array DALI2+. Reaction products were analyzed with the SAMURAI spectrometer, which allowed the measurement of the momentum distributions and angular momentum transfer. Data are compared to state-of-the-art theoretical predictions, including shell model, energy-density functional, and ab initio calculations. An onset of collectivity is suggested besides the spherical configuration typical of a closed shell nucleus, such as for 52Ca.

Item Type:	Article
Uncontrolled Keywords:	experimental nuclear physics; radioactive beams; shell model
Subjects:	NATURAL SCIENCES > Physics > Nuclear Physics
Divisions:	Division of Experimental Physics
Depositing User:	Ivana Vuglec
Date Deposited:	29 Apr 2026 10:15
URI:	https://fulir.irb.hr:/id/eprint/11411
DOI:	10.1103/PhysRevC.109.034312

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