Angular Correlations of Cascade Gamma Rays in the Decay ofLu172

Abstract

Angular correlation experiments have been performed on the 1095-78.7, 901-1095, 901-78.7, and 1586-78.7 keV $\gamma$-ray cascades in ${\mathrm{Lu}}^{172}$. The results of the directional correlation and polarization correlation measurements on the 1095-78.7 keV gamma rays establish the spin and parity of the 1174-keV excited state as 3+. The other measurements are consistent with previous assignments for the spins and parities of the 1664- and 2075-keV excited states.