Angular correlations of $\gamma$ rays leading to states in ${}_{}{}^{39}{}_{}{}^{}\mathrm{Ca}$ at 2.47, 2.80, 3.03, 3.66, 3.95, and 4.02 MeV have been measured. The spins and parties of the first three excited states were found to be ${\mathrm{½}}^{+}$, ${\frac{7}{2}}^{-}$, and ${\frac{3}{2}}^{-}$, in agreement with previous work. The mixing ratio determined for the 2.80→g.s. transition implies 98% $M2\mathrm{}$, in disagreement with an earlier measurement. In conjunction with $l$-value assignments from distorted-wave Born-approximation analysis of charged-particle angular distributions, the present work assigns $J^{\pi }={\frac{9}{2}}^{-}$ for the 3.66-MeV state, ${\frac{3}{2}}^{-}$ for the 3.95-MeV state, and ${\mathrm{½}}^{+}$ for the 4.02-MeV state. Multipole mixing and branching ratios were extracted from the data.

• Received 25 August 1969

DOI:https://doi.org/10.1103/PhysRevC.1.470