Lifetime of the $4^+_1$ state of $^{132}$Te
H. Mayr, T. Stetz, V. Werner, M. Beckers, A. Blazhev, A. Esmaylzadeh, J. Fischer, R. -B. Gerst, K. A. Gladnishki, K. E. Ide, J. Jolie, V. Karayonchev, E. Kleis, H. Kleis, P. Koch, D. Kocheva, C. M. Nickel, T. Otsuka, A. Pfeil, N. Pietralla, G. Rainovski, F. von Spee, M. Stoyanova, Y. Tsunoda, R. Zidarova
Published: 2025/9/23
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$^*$. The $E2$ decay transition strength has been determined to be $B(E2; 4^+_1\rightarrow 2^+_1) = 9.3(10)\, \text{W.u.}$ and compares favourably to shell model calculations.