Role of nuclear dissipation and entrance channel mass asymmetry in pre-scission neutron multiplicity enhancement in fusion-fission reactions
- Department of Physics, Panjab University, Chandigarh 160014 (India)
- Inter University Accelerator Centre, New Delhi 110067 (India)
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064 (India)
- Department of Physics, Banaras Hindu University, Varanasi 221005 (India)
- Dipartimento di Fisica and Sezione INFN Padova, I-35131 Padova (Italy)
Pre-scission neutron multiplicities are measured for {sup 12}C + {sup 204}Pb and {sup 19}F + {sup 197}Au reactions at laboratory energies of 75-95 MeV for the {sup 12}C beam and 98-118 MeV for the {sup 19}F beam. The chosen projectile-target combinations in the present study lie on either side of the Businaro-Gallone mass asymmetry ({alpha}{sub BG}) and populate the {sup 216}Ra compound nucleus. The dissipation strength is deduced after comparing the experimentally measured neutron yield with the statistical model predictions which contains the nuclear viscosity as a free parameter. Present results demonstrate the combined effects of entrance channel mass asymmetry and the dissipative property of nuclear matter on the pre-scission neutron multiplicity in fusion-fission reactions.
- OSTI ID:
- 21192121
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 78, Issue 2; Other Information: DOI: 10.1103/PhysRevC.78.024609; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pre-scission sup 4 He multiplicity in the sup 19 F+ sup 197 Au reaction
Entrance channel effects in the fusion-fission time scales from studies of prescission neutron multiplicities