Investigation of the (p,p'), (p,d) and (p,t) reactions on some light Sn isotopes

The results are presented of the 112Sn(p,p')112Sn reaction. Apart from the usual distorted-wave analysis the excitation of some states is described in the coupled-channels formalism. The results of the 112Sn(p,d)111Sn and the 112Sn(p,t)110Sn reactions are also reported. From the (p,d) reaction quasi-particle energies and occupation numbers are determined. Two-step DWBA calculations are performed for some states that are assumed to result from the coupling of a quasiparticle to the 2+1 or 3-1 state of the even core. In the gross structure above 3 MeV of excitation, pickup strength from deeply-bound hole states is observed. The (p,t) reaction provided spin and parity of a number of levels in 110Sn. A two-step DWBA analysis of the excitation of the ground state and first excited 2+ state shows the importance of second-order processes. The combined results of the (p,t) reactions on 112Sn, 114Sn and 116Sn are given with some emphasis on the systematic features. The derivation is given of some expressions for spectroscopic amplitudes necessary in the two-step DWBA calculations for the (p,t) reactions. For all reactions a comparison is made with other existing data and with the results of model calculations. (Auth.)