학술논문
Low-lying single-particle structure of 17C and the N = 14 sub-shell closure
Document Type
article
Author
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
Source
Physics Letters B, Vol 811, Iss , Pp 135939- (2020)
Subject
Language
English
ISSN
0370-2693
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 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.