Angular Correlations inTi48

Abstract

The angular correlations of the (0.99, 1.32) Mev and (2.23, 0.99) Mev gamma-ray cascades in ${\mathrm{Ti}}^{48}$ have been measured and are consistent with spin assignments to the ground, 0.99-, 2.31-, and 3.22-Mev states of 0, 2, 4, and 4, respectively. Taken with these results, the measured values of the two polarization-direction correlations for the (0.99, 1.32) Mev cascade rule out most spin assignments for the first three levels which require a mixed 1.32-Mev transition, and show that these levels must all have even parity. The mean lifetime of the 0.99-Mev level was found to be ${10}^{-11\mathrm{}}$ sec.