Isoscaling Studies of Fission - a Sensitive Probe into the Dynamics of Scission

Details Isoscaling Studies of Fission - a Sensitive Probe into the Dynamics of Scission Isoscaling Studies of Fission - a Sensitive Probe into the Dynamics of Scission

2003-06-05

arxiv.org/abs/nucl-ex/0306009v6

Phys.Rev. C69 (2004) 044607

Physics

Nuclear Physics

Nuclear Experiment

7 pages, 3 figures, RevTex, final version, to appear in Phys. Rev. C as a regular article

Scientific paper

10.1103/PhysRevC.69.044607

The fragment yield ratios were investigated in the fission of 238,233U targets induced by 14 MeV neutrons. The isoscaling behavior was typically observed for the isotopic chains of fragments ranging from the proton-rich to the most neutron-rich ones. The observed high sensitivity of neutron-rich heavy fragments to the target neutron content suggests fission as a source of neutron-rich heavy nuclei for present and future rare ion beam facilities, allowing studies of nuclear properties towards the neutron drip-line and investigations of the conditions for nucleosynthesis of heavy nuclei. The breakdowns of the isoscaling behavior around N=62 and N=80 manifest the effect of two shell closures on the dynamics of scission. The shell closure around N=64 can be explained by the deformed shell. The investigation of isoscaling in the spontaneous fission of 248,244Cm further supports such conclusion. The Z-dependence of the isoscaling parameter exhibits a structure which can be possibly related to details of scission dynamics. The fission isoscaling studies can be a suitable tool for the investigation of possible new pathways to synthesize still heavier nuclei.

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