Low-lying collective states in neutron-rich oxygen isotopes via proton scattering
2000; Elsevier BV; Volume: 490; Issue: 1-2 Linguagem: Inglês
10.1016/s0370-2693(00)00983-7
ISSN1873-2445
AutoresE. Khan, Y. Blumenfeld, Nguyen Van Giai, T. Suomijärvi, N. Alamanos, F. Auger, G. Colò, Nathalie Frascaria‐Lacoste, A. Gillibert, T. Glasmacher, M. A. Godwin, K. W. Kemper, V. Lapoux, I. Lhenry, François Maréchal, D. J. Morrissey, A. Musumarra, N. A. Orr, S. Ottini-Hustache, P. Piattelli, E. Pollacco, P. Roussel‐Chomaz, J.C. Roynette, D. Santonocito, J. E. Sauvestre, J. A. Scarpaci, C. Volpe,
Tópico(s)Advanced Chemical Physics Studies
ResumoProton elastic and inelastic scattering angular distributions to the 2+1 and the 3−1 states for the neutron-rich nucleus 20O were measured with a secondary beam using the MUST silicon strip detector array. Data for 18O were also obtained for comparison. A phenomenological analysis has been used to deduce the deformation parameters βp,p′ for the collective excitations. Matter and transition densities were generated from self-consistent QRPA calculations. DWBA calculations using microscopic optical potentials obtained with these densities and the JLM interaction are compared to the data. The isovector character of the 2+1 state in 20O is confirmed and predictions are discussed for the properties of the heavier neutron-rich oxygen isotopes.
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