학술논문
An above-barrier narrow resonance in 15F
Document Type
article
Author
F. de Grancey; A. Mercenne; F. de Oliveira Santos; T. Davinson; O. Sorlin; J.C. Angélique; M. Assié; E. Berthoumieux; R. Borcea; A. Buta; I. Celikovic; V. Chudoba; J.M. Daugas; G. Dumitru; M. Fadil; S. Grévy; J. Kiener; A. Lefebvre-Schuhl; N. Michel; J. Mrazek; F. Negoita; J. Okołowicz; D. Pantelica; M.G. Pellegriti; L. Perrot; M. Płoszajczak; G. Randisi; I. Ray; O. Roig; F. Rotaru; M.G. Saint Laurent; N. Smirnova; M. Stanoiu; I. Stefan; C. Stodel; K. Subotic; V. Tatischeff; J.C. Thomas; P. Ujić; R. Wolski
Source
Physics Letters B, Vol 758, Iss C, Pp 26-31 (2016)
Subject
Language
English
ISSN
0370-2693
1873-2445
1873-2445
Abstract
Intense and purified radioactive beam of post-accelerated 14O was used to study the low-lying states in the unbound 15F nucleus. Exploiting resonant elastic scattering in inverse kinematics with a thick target, the second excited state, a resonance at ER=4.757(6)(10) MeV with a width of Γ=36(5)(14) keV was measured for the first time with high precision. The structure of this narrow above-barrier state in a nucleus located two neutrons beyond the proton drip line was investigated using the Gamow Shell Model in the coupled channel representation with a 12C core and three valence protons. It is found that it is an almost pure wave function of two quasi-bound protons in the 2s1/2 shell.