Angular-Correlation Study of Levels inSc42Using theCa40(He3,pγ)Sc42Reaction

Angular correlations of $\gamma$ rays have been measured in coincidence with protons leading to states in ${}_{}{}^{42}{}_{}{}^{}\mathrm{Sc}$ at 0.61, 1.49, 1.51, 1.59 MeV, and one member of a doublet at 1.88 MeV. The measurements imply spin 1 for the 0.61-MeV state and for one member of the 1.88-MeV doublet. The best fit to the correlation for the 1.49-MeV state is obtained for spin 3, but other spins cannot be excluded. The 1.51-MeV state decays 100% to the isomeric $7^{+}$ state at 0.62 MeV. The 1.59-MeV state is measured to have spin 2. The relative populations of the $M=\pm 1$ and $M=0\mathrm{}$ magnetic substates are extracted from the data and compared with a simple direct-reaction model.