Abstract

Half-lifer (T-1/2) of exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured at the RIKEN Nishina Center. The experimental setup consisted of the BigRIPS in-flight separator for ion selection identification, the Advance Implantation Detector Array (AIDA) for ions and beta detection, and the BRIKEN detector for neutron counting. Using this setup, 4 new T-1/2 have been measured for the first time, and 38 T-1/2 have been remeasured with improved precision in several cases. These new experimental data should help to constrain theoretical models for calculations of T-1/2.The status of the experimental analysis and preliminary results are provided in this contribution.