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Título

Global properties of K hindrance probed by the gamma decay of the warm rotating W-174 nucleus

Autor Vandone, V.; Leoni, Silvia; Benzoni, G.; Blasi, N.; Bracco, A.; Brambilla, S.; Boiano, C.; Bottoni, S.; Camera, F.; Corsi, A.; Crespi, F. C. L.; Giaz, A.; Million, B.; Nicolini, R.; Pellegri, L.; Pullia, A.; Wieland, O.; Bortolato, D.; De Angelis, G.; Calore, E.; Gottardo, A.; Maron, G.; Napoli, D. R.; Rosso, D.; Sahin, E.; Valiente-Dobón, J. J.; Bazzacco, D.; Bellato, Marco; Farnea, E.; Lunardi, S.; Menegazzo, R.; Mengoni, D.; Molini, P.; Michelagnoli, C.; Montanari, D.; Recchia, F.; Ur, C. A.; Gadea, Andrés ; Huyuk, Tayfun ; Cieplicka, N.; Maj, A.; Kmiecik, M.; Atac, A.; Akkoyun, S.; Kaskas, A.; Soderstrom, P. -A.; Birkenbach, B.; Cederwall, B.; Coleman-Smith, P. J.; Cullen, D. M.; Desesquelles, P.; Eberth, J.; Goergen, A.; Grebosz, J.; Hess, H.; Judson, D.; Jungclaus, Andrea ; Karkour, N.; Nolan, P.; Obertelli, A.; Reiter, P.; Salsac, M. D.; Stezowski, O.; Theisen, Ch.; Matsuo, M.; Vigezzi, E.
Palabras clave [PACS] Collective models
[PACS] γ transitions and level energies
[PACS] Collective levels
Fecha de publicación 13-sep-2013
EditorAmerican Physical Society
Citación Physical Review C - Nuclear Physics 88: 034312 (2013)
ResumenThe K hindrance to the gamma decay is studied in the warm rotating W-174 nucleus, focusing on the weakening of the selection rules of the K quantum number with increasing excitation energy. W-174 was populated by the fusion reaction of Ti-50 (at 217 MeV) on a Te-128 target, and its gamma decay was detected by the AGATA Demonstrator array coupled to a BaF2 multiplicity filter at Laboratori Nazionali di Legnaro of INFN. A fluctuation analysis of gamma coincidence matrices gives a similar number of low-K and high-K discrete excited bands. The results are compared to simulations of the gamma-decay flow based on a microscopic cranked shell model at finite temperature in which the K mixing is governed by the interplay of Coriolis force with the residual interaction. Agreement between simulations and experiment is obtained only by hindering the E1 decay between low-K and high-K bands by an amount compatible with that determined by spectroscopic studies of K isomers in the same mass region, with a similar trend with excitation energy. The work indicates that K mixing due to temperature effects may play a leading role for the entire body of discrete excited bands, which probes the onset region of K weakening. ©2013 American Physical Society
URI http://hdl.handle.net/10261/103786
DOI10.1103/PhysRevC.88.034312
Identificadoresissn: 0556-2813
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