par Pellegriti, Maria Grazia;Achouri, N. L.;Angulo Perez, Carmen 
;Angelique, J.-C.;Berthoumieux, Eric;Casarejos, Enrique;Couder, Manoël;Davinson, Thomas;Ghag, C.;Murphy, A. St J.;Orr, Nigel;Ray, I.;Stefan, Iulian Gh;Descouvemont, Pierre
Référence Physics letters. Section B, 659, 5, page (864-869)
Publication Publié, 2008
;Angelique, J.-C.;Berthoumieux, Eric;Casarejos, Enrique;Couder, Manoël;Davinson, Thomas;Ghag, C.;Murphy, A. St J.;Orr, Nigel;Ray, I.;Stefan, Iulian Gh;Descouvemont, Pierre Référence Physics letters. Section B, 659, 5, page (864-869)
Publication Publié, 2008
Article révisé par les pairs
| Résumé : | We present an experimental study of 19Na states in the excitation energy range between 2 and 3 MeV. The presence of 19Na single-particle levels at these energies was first predicted by a microscopic cluster model and then experimentally confirmed by measuring the elastic and inelastic scattering of a 66 MeV 18Ne radioactive beam on a (CH2)n target. The H(18Ne, p)18Ne(g.s.) and H(18Ne, p′)18Ne*(2+, 1.887 MeV) cross sections have been obtained in the laboratory angular range θlab = 6.1 ° - 18.4 ° and analyzed by using the R-matrix method. Two new states in 19Na have been observed at centre-of-mass energies Ec . m . = 2.78 ± 0.01 MeV and 3.09 ± 0.05 MeV. Both resonances exhibit large widths in the 18Ne (2+) + p channel, and low branching ratios into the elastic channel. The reduced proton widths confirm the single-particle nature of these states, with a 18Ne (2+) + p structure. © 2007 Elsevier B.V. All rights reserved. |
