Fission-Imposed Limits to the Angular Momentum Carried by Evaporation Residues from the Compound NucleusPb200

Abstract
Two reactions, Ta181+ F19 and Er170+ Si30, have been used to produce Pb200. Measurements of fission and evaporation residues allow the fission probability to be obtained as a function of input angular momentum. Fission sets a sharp limit (35) to the angular momentum which can be observed in the evaporation residues.