Fusion enhancement in the {sup 32,38}S+{sup 181}Ta reaction

We measured the capture-fission excitation functions for the {sup 32}S+{sup 181}Ta reaction and the {sup 38}S+{sup 181}Ta reaction. (The radioactive {sup 38}S beam was produced by projectile fragmentation.) In the {sup 32}S-induced reaction, an incomplete fusion component was observed at high energies, with an average linear momentum transfer corresponding to the escape of an {alpha} particle. The deduced interaction barrier heights were 130.7{+-}0.3 and 124.8{+-}0.3 MeV for the {sup 32}S- and {sup 38}S-induced reactions, respectively. No differences between the two reactions were observed beyond a simple shift in the interaction barrier height.