Lifetime of the $4_1^{+}$ state of ${}^{132}$Te

Abstract

The evolution of the collectivity of tellurium isotopes from mid-shell towards $N=82$ is currently based mainly on properties of the first excited $2^{+}$ states. To extend structural information in this isotopic chain, in particular with respect to the balance of microscopic, seniority-type and collective excitations, electric quadrupole transition strengths from $4^{+}$ states need to be considered. An experiment was performed to determine the $4_1^{+}$ lifetime of ${}^{132}$Te via the recoil-distance Doppler-shift method at the University of Cologne tandem accelerator. The isotope of interest was populated in the two neutron-transfer reaction ${}^{130}$Te(${}^{18}$O,${}^{16}$O)${}^{132}$Te${}^{\ast }$. The $E2$ decay transition strength has been determined to be $B(E2;4_1^{+}\to 2_1^{+})=9.3(10)\text{W.u.}$ and compares favourably to shell model calculations.