The Ca42(d,t)Ca41, Ca43(d,t)Ca42, Ca44(d,t)Ca43, Ca46(d,t)Ca45, Ca48(d,t)Ca47, Ca42(d,He3)K41, Ca43(d,He3)K42, and Ca44(d,He3)K43, reactions have been investigated at an incident deuteron energy of 22 MeV. The angular distributions have been compared with distorted-wave calculations and the spectroscopic strength has been extracted. The larger fraction of the d32 strength was found in the 32+ states at 2.02, 0.99, 1.89, and 2.60 MeV in Ca41, Ca43, Ca45, and Ca47, respectively. Strong s-wave transitions were observed to levels at 1.96, 2.40, and 2.60 MeV in Ca43, Ca45, and Ca47, respectively. The + hole state at 2.67 MeV in Ca41 was found to be less pure than the other strong s- and d-hole states. Similarly, a pronounced fractionation of the s-hole configuration among the levels at 0.982, 1.273, 1.595, and 2.73 MeV was found in K41in contrast with the other even-parity hole states in K41 and K43 (including the + level at 0.56 MeV), which are rather pure. This splitting is attributed in part to the interaction of another + state with the s-proton hole state. Some 2p32 admixture was observed in each of the neutron pickup reactions and a 2p12 admixture was seen in Ca48. Comparison between the relative intensities of the transitions to the 32- levels in Ca41 and Ca43 and those of the (d,p) reactions to those levels suggest the admixture of core-excited configurations in the ground state of Ca42 and Ca44. The upper limit for the f72-proton admixture in the ground state of Ca42 was found to be C2S0.4. The second 0+ state in Ca42 is excited with about 10% of the strength of the first 0+ state. The strength of the transitions to the 0+ and 2+ states together with those of the 4+ and 6+ states is significantly smaller than expected from simple shell-model considerations and suggests that other levels with (f72)2 configurations exist in Ca42 at higher energies. The l=0 transitions to states in Ca42 rarely mix with the l=2 transitions. There is a fairly good correspondence between the s-hole states and the 3- states. Application of the sum rule and comparison with the other reactions suggest that the total spectroscopic factor for s12, T=1 pickup is considerably smaller than would be expected from a closed 2s shell. The four lowest levels in K42 have l=2 transitions and the strengths are in agreement with a 2-, 3-, 4-, 5- sequence. In addition, s-proton hole states in K42 were observed at 1.2, 2.01, and 2.13 MeV. A possible d52-hole state was found in K41 at an excitation energy of 3.566 MeV. © 1969 The American Physical Society.
