par Angulo Perez, Carmen 
;Tabacaru, Gabriel;Couder, Manoël;Gaelens, Michel;Leleux, Pol;Ninane, A.;Vanderbist, Francis ;Davinson, Thomas;Woods, Philippe J.;Schweitzer, Jeffrey S.;Achouri, N. L.;Angélique, Jean Claude;Berthoumieux, Eric;de Oliveira Santos, François;Himpe, P.;Descouvemont, Pierre
Référence Physical Review C (Nuclear Physics), 67, 1, page (1-4), 014308
Publication Publié, 2003
;Tabacaru, Gabriel;Couder, Manoël;Gaelens, Michel;Leleux, Pol;Ninane, A.;Vanderbist, Francis ;Davinson, Thomas;Woods, Philippe J.;Schweitzer, Jeffrey S.;Achouri, N. L.;Angélique, Jean Claude;Berthoumieux, Eric;de Oliveira Santos, François;Himpe, P.;Descouvemont, Pierre Référence Physical Review C (Nuclear Physics), 67, 1, page (1-4), 014308
Publication Publié, 2003
Article révisé par les pairs
| Résumé : | The second excited state (Jπ = 1/2,+, l = 0) of the proton-rich nucleus 19Na has been observed for the first time using the elastic scattering reaction 1H(18Ne, 1H) 18Ne. An intense (4 × 106 pps) 18Ne radioactive beam was produced at the CRC-RIB facility at Louvain-la-Neuve to bombard a polyethylene target. The recoil protons were detected at 20 different angles in the LEDA segmented silicon detector. The resulting elastic scattering cross sections have been analyzed using a global R-matrix. fit. We find that the second excited state in 19Na lies at the center-of-mass energy Ec.m. = 1.066±0.003 MeV with respect to the 18Ne+p threshold, and has a proton width Γp = 101±3 keV. The Coulomb shift between the 1/2+ mirror levels in 19O and 19Na is 0.73 MeV, among the largest values currently observed in light exotic nuclei. |
