Nuclear Structure of Sc44. I. The Ca44(He3,t)Sc44 Reaction

Abstract

The ${\mathrm{Ca}}^{44}({\mathrm{He}}^3,t){\mathrm{Sc}}^{44}$ reaction has been studied, at in incident energy of $E_{{\mathrm{He}}^{3++}}=25\mathrm{}$ MeV, with a magnetic spectrograph. A total of 52 levels in ${\mathrm{Sc}}^{44}$ have been identified below an excitation energy of 3.35 MeV. 10 of the observed levels have not been previously reported. Angular distributions have been measured for most of the levels and analyzed by means of the distorted-wave Born approximation. Definite $L$-transfer values and spin assignments have been made to many levels. As a result, eight states predicted by a recent ${\mathrm{}\left(\mathrm{fp}\right)\mathrm{}}^4$ calculation have been identified. In addition, four of the states predicted by a calculation with a single $d_{\frac{3}{2}}$ hole have been tentatively identified. The isobaric analog of the ${\mathrm{Ca}}^{44}$ ground state was located at an excitation energy of 2781 ± 5 keV, in good agreement with previous results.