Weak Transition in the ^42,44Ca(d, p)^43,45Ca Reaction above and below the Coulomb Barrier

Abstract

A low-lying 5/2⁻ (0.373 MeV) state and a 3/2⁻ (0.593 MeV) state in ⁴³Ca, and a 5/2⁻ (0.176 MeV) state of ⁴⁵Ca were studied by means of the (d, p) reaction above and below the Coulomb barrier. The angular distributions and the excitation functions were measured for these weakly excited states, and the obtained data together with the reported data at E_d=7.0 and 10.0 MeV were analyzed using the second-order DWBA and the statistical compound model. For the 5/2⁻ and the 3/2⁻ states of ⁴³Ca, the contribution from the direct process plays a significant role and gives evidence of the single particle component in the wave functions of these states, but this process can hardly be considered for the 5/2⁻ (0.176 MeV) state of ⁴⁵Ca.