Sub-nanosecond Half-life Measurement of the Yrast Iπ=5− State in the N=78 Nucleus Ce58136 using Fast-timing Coincident Gamma-ray Spectroscopy

• Published in: Nuclear data sheets Vol. 120; pp. 59 - 61
• Main Authors: Alharbi, T., Regan, P.H., Mărginean, N., Podolyák, Zs, Bajoga, A., Britton, R., Bucurescu, D., Deleanu, D., Filipescu, D., Ghită, D., Glodariu, T., Mihai, C., Mulholland, K., Mărginean, R., Negret, A., Nita, C.R., Patel, Z., Roberts, O.J., Stroe, L., Sava, T., Townsley, C., Zamfir, N.V.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.06.2014
• ISSN: 0090-3752; 1095-9904
• DOI: 10.1016/j.nds.2014.07.006

We report on the measurement of the half-life of the yrast Iπ=5− state in the transitional nucleus 136Ce using a combined HPGe-LaBr3(Ce) scintillator gamma-ray detection array. The measured value for the E1 decay is approximately half a nanosecond, which corresponds to an E1 decay strength of approximately 2×10−6 Wu. This value is in line with single-particle type E1 decays in this mass region and suggests no sign of additional K-hindrance associated with axially symmetric quadrupole deformations observed for lighter cerium isotopes.