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Khan, E.; Blumenfeld, Y.; Van Giai, Nguyen; Suomijärvi, T.; Alamanos, N.; Auger, F.; Colò, G.; Frascaria, N.; Gillibert, A.; Glasmacher, T.; Godwin, M.; Kemper, K.W.; Lapoux, V.; Lhenry, I.; Maréchal, F.; Morrissey, D.J.; Musumarra, A.; Orr, N.A.; Ottini-Hustache, S.; Piattelli, P.; Pollacco, E.C.; Roussel-Chomaz, P.; Roynette, J.C.; Santonocito, D.; Sauvestre, J.E.; Scarpaci, J.A.; Volpe, C.
Physics letters. B, 09/2000, Letnik: 490, Številka: 1Journal Article
Proton elastic and inelastic scattering angular distributions to the 2 + 1 and the 3 − 1 states for the neutron-rich nucleus 20 O were measured with a secondary beam using the MUST silicon strip detector array. Data for 18 O were also obtained for comparison. A phenomenological analysis has been used to deduce the deformation parameters β p,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 20 O is confirmed and predictions are discussed for the properties of the heavier neutron-rich oxygen isotopes.
