In a fusion-evaporation reaction the total gamma-energy and multiplicity af
ter particle evaporation - the so-called entry distribution - can be used t
o estimate the height of the fission barrier as function of angular momentu
m. This method is especially favorable for unstable nuclei, for which the f
ission barrier is otherwise very difficult to measure. Here, we have measur
ed the entry distributions of Th-220 at beam energies of 206 MeV and 219.5
MeV in the Yb-176(Ca-48,4n) reaction. The results are compared to a previou
s measurement using photofission.