Onset of collectivity for argon isotopes close to N = 32

Linh, B. D.; Corsi, A.; Gillibert, A.; Obertelli, A.; Doornenbal, P.; Barbieri, C.; Duguet, T.; Gómez-Ramos, M.; Holt, J. D.; Hu, B. S.; Miyagi, T.; Moro, A. M.; Navrátil, P.; Ogata, K.; Péru, S.; Phuc, N. T. T.; Shimizu, N.; Somà, V.; Utsuno, Y.; Achouri, N. L.; Baba, H.; Browne, F.; Calvet, D.; Château, F.; Chen, S.; Chiga, N.; Cortés, M. L.; Delbart, A.; Gheller, J.-M.; Giganon, A.; Hilaire, C.; Isobe, T.; Kobayashi, T.; Kubota, Y.; Lapoux, V.; Liu, H. N.; Motobayashi, T.; Murray, I.; Otsu, H.; Panin, V.; Paul, N.; Rodriguez, W.; Sakurai, H.; Sasano, M.; Steppenbeck, D.; Stuhl, L.; Sun, Y. L.; Togano, Y.; Uesaka, T.; Wimmer, K.; Yoneda, K.; Aktas, O.; Aumann, T.; Chung, L. X.; Flavigny, F.; Franchoo, S.; Gašparić, I.; Gerst, R. B.; Gibelin, J.; Hahn, K. I.; Khai, N. T.; Kim, D.; Koiwai, T.; Kondo, Y.; Koseoglou, P.; Lee, J.; Lehr, C.; Lokotko, T.; MacCormick, M.; Moschner, K.; Nakamura, T.; Park, S. Y.; Rossi, D.; Sahin, E.; Sohler, D.; Söderström, P.-A.; Takeuchi, S.; Törnqvist, H.; Vaquero, V.; Wagner, V.; Wang, S. T.; Werner, V.; Xu, X.; Yamada, Y.; Yan, D.; Yang, Z.; Yasuda, M.; Zanetti, L.

doi:10.1103/PhysRevC.109.034312

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Onset of collectivity for argon isotopes close to N = 32

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Miyagi, T.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/prc/pdf/10.1103/PhysRevC.109.034312
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Citation

Linh, B. D., Corsi, A., Gillibert, A., Obertelli, A., Doornenbal, P., Barbieri, C., et al. (2024). Onset of collectivity for argon isotopes close to N = 32. Physical Review C, 109(3): 034312. doi:10.1103/PhysRevC.109.034312.

Cite as: https://hdl.handle.net/21.11116/0000-000F-1D95-9

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 deexcitation 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 were 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.