Entrance channel effect on ER spin distribution

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