BARC/PUB/2020/0787

 
 

Pre-scission neutron multiplicity in the 32S+184W  reaction

 
     
 
Author(s)

Patil, P. N.; Badiger, N. M.; Nayak, B. K.; Santra, S.; Rout, P. C.; Pal, A.; Mohanto, G.; Mahata, K.; Ramachandran, K.; Thomas, R. G.; Mirgule, E. T.; Gandhi, R.; Kundu, A.; De, S.; Behera, S. P.; Srinivasan, B.; Saxena, A.; and others
(NPD)

Source

Physical Review-C, 2020. Vol. 102 (3): Article no. 34618

ABSTRACT

The neutron energy spectra in coincidence with both the correlated fission fragments in 32S+184W reaction forming the compound nucleus 216Th at an excitation energy of 71.31 MeV have been measured at various angles with respect to one of the fission fragments. Pre- and post-scission neutron multiplicities of 2.68 ± 0.48 and 3.3 ± 0.20, respectively, have been extracted by analyzing angular correlation of the neutron energy spectra using moving source fitting procedure. The excess pre-scission neutron multiplicity in comparison to statistical model JOANNE2 code predictions have been converted into total fission delay. A comparative study of fission delay has been carried out for the 16O+208Pb reaction forming the compound nucleus 224Th at similar excitation energy as in 32S+184W reaction. Both the reactions have been analyzed within the frame work of JOANNE2 code including fission delay, deformation dependent level densities, particle binding energies, and transmission coefficients. The observed fission delay for both the reactions can be quantitatively understood if different formation time predicted by dynamical model HICOL code are considered.

 
 
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