Lifetimes and transition probabilities for low-lying yrast levels in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Te</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>130</mml:mn><mml:mo>,</mml:mo><mml:mn>132</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
D. Kumar, T. Bhattacharjee, S. S. Alam, S. Basak, L. Gerhard, L. Knafla, A. Esmaylzadeh, M. Ley, F. Dunkel, K. Schomaker, J.-M. Régis, J. Jolie, Y. H. Kim, U. Köster, G. S. Simpson, L. M. Fraile
Abstract
Lifetimes have been measured for the low-lying yrast levels of $^{130,132}\mathrm{Te}$ using $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ fast timing methods. The excited states were populated in ${\ensuremath{\beta}}^{\ensuremath{-}}$ and IT decay of fission fragments, mass-separated by the Lohengrin separator at Institut Laue-Langevin. Four ${\mathrm{LaBr}}_{3}$(Ce) detectors, placed at the focal plane of the spectrometer, were used for the $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ fast timing measurement. Lifetimes of $\ensuremath{\mu}\mathrm{s}$ isomers were measured using coincidence of an ionization chamber with two Clover HPGe detectors. The measured lifetimes and absolute transition probabilities are discussed in the light of systematics with the neighboring nuclei. Large basis shell model calculations have been performed to interpret the level structure and transition probabilities in these even mass Te isotopes.