Abstract
Excitation functions (EFs) for the reaction 141 Pr(α, n ) 144 Pm and 141 Pr(α,2 n ) 143 Pm have been measured using 141 Pr as a target up to 50 MeV α-particle energy. Stacked foil activation technique and γ-ray spectroscopy using 100 cm 3 Ge (Li) detector, has been used. Excitation functions are also calculated theoretically using Blann's geometry dependent hybrid (GDH) model code ALICE-91, with and without inclusion of pre-equilibrium particle emission. It has been observed that high-energy tails of the EFs are dominated by pre-equilibrium reaction mechanism. With the accepted set of input parameter, initial exciton number n 0 =4 (2 p +2 n +0 h ), a good qualitative agreement is found. However, quantitative agreement for this magic nucleus 141 Pr is also good when theoretical calculations are normalized by a multiple factor of 0.5.
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