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arXiv 2011.06101nucl-ex
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17 C的低位单粒子结构和N = 14亚壳层闭合

Low-lying single-particle structure of 17C and the N = 14 sub-shell closure

X. Pereira-López, B. Fernández-Domínguez, F. Delaunay, N. L. Achouri, N. A. Orr, W. N. Catford, M. Assié, S. Bailey, B. Bastin, Y. Blumenfeld, R. Borcea, M. Caa… 展开作者

X. Pereira-López, B. Fernández-Domínguez, F. Delaunay, N. L. Achouri, N. A. Orr, W. N. Catford, M. Assié, S. Bailey, B. Bastin, Y. Blumenfeld, R. Borcea, M. Caamaño, L. Caceres, E. Clément, A. Corsi, N. Curtis, Q. Deshayes, F. Farget, M. Fisichella, G. de France, S. Franchoo, M. Freer, J. Gibelin, A. Gillibert, G. F. Grinyer, F. Hammache, O. Kamalou, A. Knapton, T. Kokalova, V. Lapoux, J. A. Lay, B. Le Crom, S. Leblond, J. Lois-Fuentes, F. M. Marqués, A. Matta, P. Morfouace, A. M. Moro, T. Otsuka, J. Pancin, L. Perrot, J. Piot, E. Pollacco, D. Ramos, C. Rodríguez-Tajes, T. Roger, F. Rotaru, M. Sénoville, N. de Séréville, R. Smith, O. Sorlin, M. Stanoiu, I. Stefan, C. Stodel, D. Suzuki, T. Suzuki, J. C. Thomas, N. Timofeyuk, M. Vandebrouck, J. Walshe, C. Wheldon

摘要:

通过d(16 C,p)转移反应,首次研究了17 C束缚态的单粒子结构。测得的角分布确认自旋宇称分配的1/2+和5/2+的激发态位于217和335 keV,分别。这些态的光谱因子具有明显的单粒子特征,与壳层模型和粒子-核模型的计算结果一致,并结合其能量的近简并性,为不存在N = 14的亚壳层闭合提供了明确的证据.在3/2+基态发现的非常小的光谱因子与理论预测一致,表明ν 1d 3/2强度由未结合态携带。1/2+激发态具有l = 0价中子组态和很低的分离能,是单中子晕候选者。

英文摘要:

The first investigation of the single-particle structure of the bound states of 17C, via the d(16C, p) transfer reaction, has been undertaken. The measured angular distributions confirm the spin-parity assignments of 1/2+ and 5/2+ for the excited states located at 217 and 335 keV, respectively. The spectroscopic factors deduced for these states exhibit a marked single-particle character, in agreement with shell model and particle-core model calculations, and combined with their near degeneracy in energy provide clear evidence for the absence of the N = 14 sub-shell closure. The very small spectroscopic factor found for the 3/2+ ground state is consistent with theoretical predictions and indicates that the ν1d3/2 strength is carried by unbound states. With a dominant l = 0 valence neutron configuration and a very low separation energy, the 1/2+ excited state is a one-neutron halo candidate.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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