Shapes of Fragment Mass-Yield Distributions and Shapes of Scissioning Nuclei in Actinides
2002
Three fimdamental types (named A-, B- and O-type) in the fragment mass-yield distribution and three independent types of the scission deformation (β~1.65, 1.53 and 1.33) for actinide nuclei in fission process are experimentally observed. The correlations between the final shapes of fissioning nuclei and the shapes of the fragment mass-yield distributions are hence revealed and presented. A-type: deformation path with β~1.65 resulting in a typical FWHM of >20 u; B-type: deformation path with β~1.53 leading to a typical FWHM of ~15 u; O-type: deformation path with β~1.33 producing a FWHM of ~9 u.
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