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27 April 2024

» arxiv » 2011.06101

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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. 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 ;
Date:	11 Nov 2020
Abstract:	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 { u}1d3/2 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.
Source:	arXiv, 2011.06101
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