par John, Philipp Rudolf;Modamio, V;Valiente-Dobon, J.J.;Mengoni, D;Lunardi, S.;Rodriguez, T.R.;Bazzacco, D.;Gadea, A;Wheldon, C;Alexander, T;De Angelis, G.;Ashwood, N.;Barr, M;Benzoni, Giovanna;Birkenbach, B;Bizzetti, PG;Bizzetti-Sona, AM;Bottoni, S.;Bowry, M;Bracco, Angela;Browne, F;Bunce, M;Camera, F.;Cederwall, B;Corradi, Lorenzo;Crespi, Fabio Celso Luigi;Désesquelles, Pierre;Eberth, J;Farnea, E.;Fioretto, E.;Görgen, Andreas;Gottardo, A;Grebosz, J;Grente, L;Hess, H;Jungclaus, A;Kokalova, Tz;Korichi, Ahmed;Korten, W.;Kusoglu, A;Lenzi, S.M.;Leoni, S.;Ljungvall, J;Maron, G.;Meczynski, W;Melon, Barbara;Menegazzo, R.;Michelagnoli, C;Mijatovic, T.;Million, B.;Molini, P;Montagnoli, G.;Montanari, D;Napoli, D;Nolan, P M;Oziol, Ch.;Podolyak, Zs.;Pollarolo, G;Pullia, Alberto;Quintana, B.;Recchia, F;Reiter, P.;Roberts, Oliver O.J.;Rosso, D;Sahin, E;Salsac, M-.D;Scarlassara, Fernando;Sferrazza, Michele ;Simpson, J.;Soderstrom, P.-A.;Stefanini, A.M.;Stezowski, O;Szilner, Suzana;Theisen, Ch;Ur, C.A.;Walshe, J.
Référence Physical review. C. Nuclear physics, 90, 2, 021301
Publication Publié, 2014-08
Référence Physical review. C. Nuclear physics, 90, 2, 021301
Publication Publié, 2014-08
Article révisé par les pairs
Résumé : | The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188-198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states. © 2014 American Physical Society. |