Abstract
The ( 3He, n) reaction has been studied using targets of 104, 106, 108, 110Pd and 106, 110, 112, 114, 116Cd at bombarding energy of 25.4 MeV. Angular distributions were obtained from 0° to 25° and the results compared with the predictions of the single-step zero-range DWBA theory. In addition to the ground-state transition, numerous L = 0 transitions were observed up to 5 MeV excitation in the residual nuclei. The pairing vibration state was found to be fragmented in all final nuclei and, except for 106, 108Cd, a strong L = 0 transition was observed to a state at an excitation energy much below that predicted for the pairing vibration. If this state is assumed to be a fragment of the pairing vibrational state, then the total strength to excited 0 + states is in reasonable agreement with the strength observed in the corresponding Sn( 3He, n)Te ground-state transition. However, the centroid energy of the pairing vibrational state is then much lower than expected. No transitions with L > 0 were excited with measurable strength.
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