1986•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
Mass distributions of fission fragments from heated nuclei and the drop model
E.N. Gruzintsev, Mikhail G. Itkis, S.I. Mul'gin, V.N. Okolovich, A. Ya. Rusanov, G.N. Smirenkin
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Abstract
Mass distributions have been measured for fission fragments from the target nuclei /sup 162/Dy, /sup 169/Tm, /sup 176/Hf, /sup 181/Ta, and /sup 180/W bombarded by /sup 3/He ions of energy 60-65 MeV. From the experimental data on the dispersion of the distributions the stability parameters of the nuclei at the saddle point have been determined with respect to mass-asymmetric deformations Q, and these are compared with the predictions of the liquid-drop statistical model and fluctuation-dissipation dynamics. A quantitative analysis of the dependence Q(X) and the fission barriers shows the incompleteness of the contemporary description of the macroscopic component of the masses and energies of the nuclei.