Dynamical effects in the decay of a compound nucleus

We have measured the α-particle spectra at different laboratory angles from the fusion reaction ¹⁶O+⁵⁴Fe at 110 MeV. The results are compared with the ²⁸Si+²⁷Al symmetric system. In the case of the asymmetric ¹⁶O+⁵⁴Fe system α spectra are consistent with the predictions of the statistical model calculations but in the case of the symmetric ²⁸Si+²⁷Al system, experimental spectra deviate at higher as well as at lower energies from the statistical model calculations. The results are also compared with a less asymmetric ²⁸Si+⁵¹V system. There is a systematic change in the formation time of the compound nucleus as we move from the asymmetric to the symmetric systems. The dynamical trajectory model calculations have been done to understand the possible entrance channel effects on the formation and the decay of the compound nucleus.