4 years ago

Half-lives of neutron-rich $^{128-130}$Cd.

C. M., Ilyushkin, Olaizola, Turko, Svensson, MacConnachie, Garrett, Jungclaus, C. E., Garcia, Krücken, L. J., Zidar, Evitts, Boubel, Burbadge, Andreoiu, MacLean, Moukaddam, Dillmann, Bildstein, J. K., P. E., G. C., A. D., Caballero-Folch, Smallcombe, McGee, Henderson, Dunlop, Garnsworthy, Kisliuk, Tabor, Lassen, Ball, Pore, Teigelhöfer, Hackman, M. R., Petrache, J. L., Padilla-Rodal, Smith, A. J., Ruotsalainen, Hallam, Radich, Bernier, S. L., Dunlop, Paetkau, Bidaman, Park, A. B.

The $\beta$-decay half-lives of $^{128\text{--}130}$Cd have been measured with the newly commissioned GRIFFIN $\gamma$-ray spectrometer at the TRIUMF-ISAC facility. The time structures of the most intense $\gamma$-rays emitted following the $\beta$-decay were used to determine the half-lives of $^{128}$Cd and $^{130}$Cd to be $T_{1/2}= 246.2(21)$ ms and $T_{1/2}= 126(4)$ ms, respectively. The half-lives of the 3/2$^+$ and 11/2$^-$ states of $^{129}$Cd were measured to be $T_{1/2}(3/2^+)= 157(8)$ ms and $T_{1/2}(11/2^-)= 147(3)$ ms. The half-lives of the Cd isotopes around the $N=82$ shell closure are an important ingredient in astrophysical simulations to derive the magnitude of the second $r$-process abundance peak in the $A\sim130$ region. Our new results are compared with recent literature values and theoretical calculations.

Publisher URL: http://arxiv.org/abs/1711.05621

DOI: arXiv:1711.05621v1

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