Complete fusion studies of the 20Ne+235U system

The probability for complete fusion has been measured for the 20Ne+235U system at bombarding energies of 175 and 252 MeV. The fission fragment angular correlation technique was used to obtain both the absolute cross section for complete fusion and relative cross sections for the ratio of complete fusion to incomplete fusion processes. Total reaction cross sections were also determined from elastic scattering measurements. Values of sigmasub(R)=1900+-40 and 2810+-140 mb were obtained at 175 and 252 MeV, respectively. These measurements yield sigmasub(CF)/sigmasub(R)=0.74+-0.05 at 175 MeV and 0.48+-0.06 at 252 MeV. The corresponding values of the critical angular momentum are compared with the predictions of several heavy-ion interaction models. It is observed that the lsub(c) values obtained from these data agree well with the current models, although the energy dependence is not as strong as predicted. In addition, it is observed that these values of lsub(c) exceed the limiting value for a charged rotating drop. (Auth.)