The ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}(\alpha ,\gamma ){}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$ reaction has been used to study the nucleus ${}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$. The mass excess of ${}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$ has been determined to be -37 541 ± 10 keV. Radiative yields and angular distributions of deexcitation $\gamma$ rays from resonances at 4.22-, 4.26-, and 4.52-MeV $\alpha$ energy, and angular distributions of $\gamma$ rays between bound levels have been measured using Ge(Li) detectors. Bound states have been found at 1083 ($2^{+}$), 1905 ($0^{+}$), 2454 ($4^{+}$), 2531 ($2^{+}$), 2886 ($2^{+}$), 3175, 3415 (2, 3), 3645 and 3942 keV, and mixing ratios and branching ratios for the decays of some of these levels are reported. The ground state and first excited $2^{+}$ and $4^{+}$ states can be explained in terms of ${\mathrm{}\left(\mathrm{fp}\right)\mathrm{}}^4$ configurations. Some of the other low-energy states probably require interpretation in terms of particle-hole configurations. Relative reduced $E2\mathrm{}$ transition strengths from the 2531-keV ($2^{+}$) state are determined and suggest that the 1905- and 2531-keV states may be the beginning of a rotational band.

• Received 6 April 1971

DOI:https://doi.org/10.1103/PhysRevC.4.443