Intermediate mass fragments emission in the reaction 47 MeV ⁷Li+Mg

Abstract

The energy distributions of the intermediate mass fragments (IMFs, 4≤Z_IMF≤9) emitted in the reaction 47 MeV ⁷Li+^natMg have been measured in the angular range 15°≤θ_lab≤120°. Invariant cross sections plotted in the velocity plane have indicated the existence of a fusionlike source as well as some intermediate velocity source for lighter fragments. Source parameters for the fusionlike source and the intermediate velocity source have been extracted using phenomenological moving source model. The results of the present measurement have been extensively compared with the predictions of the binary fragmentation model. The shapes of the fragment energy distribution have been reproduced fairly well by the binary fragmentation model except for the forward angle data for Be and B. The higher energy tails in the forward angle data for Be, B are indicative of the presence of other reaction processes. Average kinetic energies of the fragments and total elemental cross sections extracted from the data have been compared with those obtained from asymmetric binary fragmentation calculations. In both cases, it has been found that the theoretical predictions are in good agremeent with the respective experimental estimates with the exception of Be and B, where the theory underpredicts the experimental results indicating additional contributions from other reaction mechanisms.