An Investigation of (d, p) Stripping Reactions IV: Results for⁴⁰Ca and⁸⁸Sr

Angular distributions have been measured of some of the proton groups emitted from targets of natural calcium and strontium under bombardment by 8 MeV deuterons. The theory of the stripping process has been used to enable assignments of spin and parity to be made to the corresponding states of 41 Ca and 89 Sr. The first and second excited states of 41 Ca are thought to be states of single-particle excitation of the odd neutron. In the following list the excitation energies in MeV are accompanied by the shell model term or the possible spin values and the parity in brackets: 41 Ca: ground state (1f 7/2 ), 1.90 (2p 3/2 ), 2.42 (2p ½ ), 3.96 (5/2, 3/2 +), 4.76 (5/2, 3/2 +), 5.72 (5/2, 3/2 +). 89 Sr: ground state (9/2, 7/2 +), 1.07 (7/2, 5/2 -). The Q -value of the transition to the ground state of 89 Sr is 4.18 ± 0.08 MeV, and this nucleus has excited states at 1.07 ± 0.08, 2.09 ± 0.08, 2.66 ± 0.08, 4.73 ± 0.1 and 5.46 ± 0.08 MeV.