New analysis of levels in 147 La
POSTER
Abstract
\newcommand{\g}{\gamma} Analysis of $\g\!-\!\g\!-\!\g$ and $\g\!-\!\g\!-\!\g\!-\!\g$ coincidence data from the spontaneous fission of $^{252}$Cf has been performed to identify new levels in $^{147}$La. These data were taken with Gammasphere at Lawrence-Berkeley National Laboratory. Twenty-two new transitions and fourteen new levels are established including a spin $39/2^+$ state and spin $47/2^-$ state. $^{147}$La lies very close to the center for octupole deformation; strong $E1$ transitions are observed connecting two opposite parity doublets validating this expected octupole deformation. Additionally, back bending in the moment of inertia plot is observed in one band.
*This work was performed while W.Lewis was a Research Experience for Undergraduates participant at Vanderbilt University.