Abstract
The 171Yb( 3He, α xn) 170− x Yb ( x = 0–4) reaction at a beam energy of 45 MeV has been studied by means of αγ-coincidence measurements for α-particle energies from 20 to 60 MeV. A strong anisotropy in the angular distribution of the α -particles is observed for the complete energy range. At the highest α-energies the reaction is described as a one-step direct pick-up reaction. For the remaining energies an interpretation in terms of a preequilibrium reaction is suggested. High quasi-temperatures are observed, indicating local heating. The reaction is found to be well localized near the surface of the nucleus.
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