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

• Main Authors: Sandall Rohit, Behera B.R., Singh Varinderjit, Kaur Maninder, Kumar A., Singh G., Singh K. P., Sugathan P., Jhingan A., Golda K. S., Chatterjee M. B., Bhowmik R. K., Kalkal Sunil, Siwal D., Goyel S., Mandal S., Prasad E., Sadhukhan J., Mahta K., Saxena A., Pal Santanu
• Format: Article
• Language: English
• Published: EDP Sciences 2014-03-01
• Series: EPJ Web of Conferences
• Online Access: http://dx.doi.org/10.1051/epjconf/20146603006

This paper report the summary of the experimental results of pre-scission neutron multiplicities from four compound nuclei, namely 210,212,214,216Rn, and statistical model analysis of the corresponding data. The compound nuclei 210,212,214,216Rn having N/Z values as 1.441, 1.465, 1.488, 1.511 respectively are populated through the 16,18O+194,198Pt reactions at excitation energies of 50, 61, 71.7 and 79 MeV. The measured neutron multiplicities are further analyzed with the statistical model of nuclear decay where fission hindrance due to nuclear dissipation is considered. The N/Z dependence of the dissipation strength at lowest excitation energy of the compound nuclei suggests shell closure effects. However, such effects are not observed at higher excitations where the variation of the dissipation strength with N/Z does not show any specific trend. The variation of N/Z in fission time scale is also shown.