Ca48(p,d)Ca47andCa48(p,t)Ca46Reactions

Abstract

This study of the ${\mathrm{Ca}}^{48}\mathrm{}(p,d)\mathrm{}{\mathrm{Ca}}^{47}$ reaction at a bombarding energy of 18 MeV finds evidence for a small admixture of neutrons from the $2p$ orbitals in the ground state of ${\mathrm{Ca}}^{48}$. The summed spectroscopic factor for $2p$ pickup is 0.36. If the mixing is of zero-coupled pairs of $2p_{\frac{3}{2}}$ neutrons, the coefficient of this admixed term in the wave function is 0.42. The positions and spectroscopic factors for several states that appear to be due to $d$-wave or $f$-wave pickup are also given, and two apparent examples of $j$ dependence are used to make spin assignments of ${\frac{5}{2}}^{-}$ in ${\mathrm{Ca}}^{47}$. Angular distributions of tritons from the ${\mathrm{Ca}}^{48}\mathrm{}(p,t)\mathrm{}{\mathrm{Ca}}^{46}$ reaction are shown for seven states of ${\mathrm{Ca}}^{46}$, but reliable spin determinations cannot be made, owing to the lack of structure in the observed distributions.