Lifetimes and Branching Ratios inTi48

Abstract

The Doppler-shift attenuation method has been used to study levels in ${\mathrm{Ti}}^{48}$ up to 3.74-MeV excitation energy. Backscattered protons from the ($p, p^{\prime }\gamma$) reaction were detected in coincidence with deexcitation $\gamma$ rays. A 32-cc Ge(Li) detector was used to measure $\gamma$-ray Doppler shifts, and to obtain branching ratios. Eleven levels in ${\mathrm{Ti}}^{48}$ were observed below 3.74 MeV. Transition rates in single-particle units are given for twelve transitions. The $0^{+}$ level at 3.000 MeV was observed to decay with a transition rate of (8±2)×${10}^{12}$ ${\sec }^{-1\mathrm{}}$, indicating a collective admixture for this state and suggesting that it is formed by the mixing of rotational and shell-model states.