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희귀 핵 연구단
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Border of the island of inversion: Unbound states in Ne-29

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Title
Border of the island of inversion: Unbound states in Ne-29
Author(s)
Holl, M.; Lindberg, S.; Heinz, A.; Kondo, Y.; Nakamura, T.; Tostevin, J. A.; Wang, H.; Nilsson, T.; Achouri, N. L.; Al Falou, H.; 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.; Fernandez, P. Diaz; Dombradi, Z.; Douma, C. A.; Elekes, Z.; Fallon, P.; Gasparic, I; Gheller, J-M; Gibelin, J.; Gillibert, A.; Harakeh, M. N.; Hirayama, A.; Hoffman, C. R.; Horvat, A.; Horvath, A.; Jongwon HWANG; Isobe, T.; Kahlbow, J.; Kalantar-Nayestanaki, N.; Kawase, S.; Sunji KIM; Kisamori, K.; Kobayashi, T.; Koerper, D.; Koyama, S.; Kuti, I; Lapoux, V; Marques, F. M.; Masuoka, S.; Mayer, J.; Miki, K.; Murakami, T.; Najafi, M.; Nakano, K.; Nakatsuka, N.; Obertelli, A.; Santos, F. de Oliveira; Orr, N. A.; Otsu, H.; Ozaki, T.; Panin, V; Paschalis, S.; Revel, A.; Rossi, D.; Saito, A. T.; Saito, T. Y.; 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.; Toernqvist, H.; Togano, Y.; Tomai, T.; Tscheuschner, J.; Tsubota, J.; Uesaka, T.; Yang, Z.; Yasuda, M.; Yoneda, K.
Publication Date
2022-03-01
Journal
PHYSICAL REVIEW C, v.105, no.3
Publisher
AMER PHYSICAL SOC
Abstract
The nucleus Ne-29 is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder f(7/2) state, which would place Ne-29 firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of Ne-29 is reported. The states were populated in Ne-30(p, pn) and Na-30(p, 2p) reactions at a beam energy of around 230 MeV/nucleon, and analyzed in terms of their resonance properties, partial cross sections, and momentum distributions. The momentum distributions are compared to calculations using the eikonal, direct reaction model, allowing assignments for the observed states. The lowest lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant l = 3 component, giving first evidence for f(7/2) single particle strength in Ne-29. The excitation energies and strengths of the observed states are compared to shell-model calculations using the SDPF-U-MIX interaction.
URI
https://pr.ibs.re.kr/handle/8788114/11576
DOI
10.1103/PhysRevC.105.034301
ISSN
2469-9985
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
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