Entrance channel effect on the pre-scission time of binary decay for the medium mass nuclei (Mass ∼ 110)

In order to study entrance channel and angular momentum effects on the pre-ecission time, light charged particle multiplicities were measured in coincidence with binary decay fragments in the reactions 58 Ni(580 MeV) + 56 Fe and 86 Kr(890 MeV) + 27 Al , which lead to similar composite systems with almost the same excitation energy. It is observed that the lifetime of the composite system decreases as the entrace channel spin increases.