Lifetime measurements in the odd-A nucleus 177Hf

L. Knafla, P. Alexa, U. Köster, G. Thiamova, J.-M. Régis, J. Jolie, A. Blanc, A. M. Bruce, A. Esmaylzadeh, L.M. Fraile, G. de France, G. Häfner, S. Ilieva, M. Jentschel, V. Karayonchev, W. Korten, T. Kröll, S. Lalkovski, S. Leoni, H. MachN. Mǎrginean, P. Mutti, G. Pascovici, V. Paziy, Zs. Podolyák, P.H. Regan, O. J. Roberts, N. Saed-Samii, G. S. Simpson, J. F. Smith, T. Soldner, C. Townsley, C. A. Ur, W. Urban, A. Vancraeyenest, N. Warr

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Lifetimes of low- and high-spin states in the odd-A nucleus 177Hf were measured during the EXILL&FATIMA campaign using a spectrometer equipped with eight HPGe-Clover detectors and 16 fast-timing LaBr3(Ce) detectors. For the determination of lifetimes in the pico- to nanosecond regime, the well-established generalized centroid difference method was used. Lifetimes of the 9/2−, 9/2+, 11/2−, 11/2+ states were remeasured, the lifetimes of the 13/2−, 17/2−, 13/2+, 15/2+, and 17/2+ states were determined for the first time and an upper limit for the 19/2+ state has been established. From these lifetimes absolute reduced transition probabilities were extracted and compared to particle-rotor-model calculations and quasiparticle-phonon-model calculations showing the importance of including multipole-multipole interactions in the description of odd-A nuclei in the rare earth region.
Original languageEnglish
Article number054322
JournalPhysical Review C
Issue number5
Publication statusPublished - 16 Nov 2020


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