Effect of N/Z in pre-scission neutron multiplicity for 16,18O + 194,198Pt systems

Journal Article · Tue Jan 01 04:00:00 EST 2013 · Physical Review C

OSTI ID:1092360

Sadhukhan, Jhilam ^[1]; Goyal, Suresh ^[1]

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1. ORNL

Pre-scission neutron multiplicities from fission of the compound nuclei 210,212,214,216Rn have been measured in order to investigate the N/Z dependence of fission hindrance. The Rn isotopes are populated through the fusion of 16,18O + 194,198Pt systems and are formed at four excitation energies in the range of 50 79 MeV. The experimental pre-scission neutron yield is compared with predictions from the statistical model of compound nuclear decay containing the strength of nuclear dissipation as a free parameter. The strength of nuclear dissipation obtained in the present analysis does not show any specific dependence on the N/Z values of the fissioning nuclei at large excitation energies. The dissipation strength at the lowest excitation energy, however, indicates a shell closure effect at N = 126 for the 212Rn isotope.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1092360
• Journal Information: Physical Review C, Journal Name: Physical Review C Journal Issue: 1 Vol. 87
• Country of Publication: United States
• Language: English