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

Vandone, V.; Leoni, S.; Benzoni, G.; Blasi, N.; Bracco, A.; Brambilla, S.; Boiano, C.; Bottoni, S.; Camera, F.; Corsi, A.; Crespi, F.; 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.; Rosso, D.; Sahin, E.; Valiente-Dobon, J.; Bazzacco, D.; Bellato, M.; Farnea, E.; Lunardi, S.; Menegazzo, R.; Mengoni, D.; Molini, P.; Michelagnoli, C.; Montanari, D.; Recchia, F.; Ur, C.; Gadea, A.; Hueyuek, T.; Cieplicka, N.; Maj, A.; Kmiecik, M.; Atac, A.; Akkoyun, SERKAN; Kaskas, A.; Soederstroem, P.; Birkenbach, B.; Cederwall, B.; Coleman-Smith, P.; Cullen, D.; Desesquelles, P.; Eberth, J.; Goergen, A.; Grebosz, J.; Hess, H.; Judson, D.; Jungclaus, A.; Karkour, N.; Nolan, P.; Obertelli, A.; Reiter, P.; Salsac, M.; Stezowski, O.; Theisen, Ch.; Matsuo, M.; Vigezzi, E.

doi:10.1103/physrevc.88.034312

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

Atıf İçin Kopyala

Vandone V., Leoni S., Benzoni G., Blasi N., Bracco A., Brambilla S., ...Daha Fazla

PHYSICAL REVIEW C, cilt.88, sa.3, 2013 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 88 Sayı: 3
Basım Tarihi: 2013
Doi Numarası: 10.1103/physrevc.88.034312
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

The 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.