Entrance channel effect on ER spin distribution

Evaporation Residue (ER) gated gamma-multiplicity was measured for the reaction 30Si + 170Er which formed the compound nucleus (CN) 200Pb. The measured multiplicity distribution was compared with those of two other reactions, viz, 16O + 184W and 19F + 181Ta forming the same CN. Further, experimental results were compared with statistical model calculations. Both comparisons indicate an absence of higher spins in ERs for 30Si + 170Er compared to the other two more asymmetric reactions. This lowering of spin value is attributed to non-compound fission.