Angular momentum bearing modes and nuclear structure effects in12C-induced fission

The angular momenta of the fragments produced in several 100 and 180 MeV¹²C induced fission reactions have been investigated usingγ-ray multiplicity (M _λ) techniques. The averageM _λ increases with both the bombarding energy and the total mass of the system. The dependence ofM _λ on mass asymmetry is generally rather weak, except in regions near shell closures, where local minima are observed. The magnitudes ofM _λ tend to be larger than expected on the basis of rigid rotation, possibly due to the excitation of collective modes. A comparison is made with a statistical model.