Attenuated Doppler shifts and particle-$\gamma$-ray angular correlations have been measured and interpreted to yield properties of electromagnetic transitions in ${\mathrm{V}}^{51}$ and ${\mathrm{Mn}}^{53}$. Mean lives have been obtained for states at 1.609, 1.813, 2.402, 2.670, and 2.699 MeV in ${\mathrm{V}}^{51}$, and for states at 1.288, 1.440, 1.619, 2.277, 2.406, 2.575, 2.641, and 2.705 MeV in ${\mathrm{Mn}}^{53}$. Possible multipole mixing ratios have been deduced for the transitions (energies in MeV) 0.378 → 0, 1.288 → 0.378, 1.619 → 0, 2.277 → 0, and 2.406 → 1.288 in ${\mathrm{Mn}}^{53}$. A possible identification of a ${\frac{15}{2}}^{-}$ state in ${\mathrm{Mn}}^{53}$ is presented. From these results and the results of other workers, transition probabilities in ${\mathrm{V}}^{51}$ and ${\mathrm{Mn}}^{53}$ have been calculated and compared (i) with one another, (ii) with a ${\left(1\mathrm{}{f}_{\frac{7}{2}}\right)}^n$ pure-configuration shell-model calculation, and (iii) with a mixed-configuration calculation.

• Received 7 October 1971

DOI:https://doi.org/10.1103/PhysRevC.5.875