Lifetime Measurement of the 2$^{+}_{1}$ state in $^{180}$Os

The lifetime of the excited 2$^{+}_{1}$ state in $^{180}$Os, was measured using the delayed coincidence timing technique. The $^{169}$Tm($^{16}$O,5n)$^{ 180}$Ir reaction was used which subsequently $\beta $-decay to populate excited states in $^{180}$Os. The Moving Tape Collector (MTC) at the Wright Nuclear Structure Laboratory (WNSL) at Yale University was used to collect the $^{180}$Ir recoil nuclei and transport them to an arrangement of four Barium Fluoride (BaF$_{2})$ scintillator detectors and one clover HPGe detector. The gamma rays emitted in transitions from the 4$^{+}_{1}$ to 2$^{+}_{1}$ and 2$^{+}_{1}$ to 0$^{+}_{gs}$ states were observed using BaF$_{2}$ detectors. The detectors were used in conjunction with fast electronic scintillation timing (FEST) techniques. The 2$^{+}_{1}$ lifetime will be input for a future g-factor measurement. First results will be presented and discussed within the study of the systematics of 2$^{+}_{1}$ states [1] in the region. This work is supported by U.S. DOE Grant No. DE-FG02-91ER-40609. References 1. Bao-An Bian et al., Phys. Rev. C \textbf{75}, 014312 (2007)