Measurement of fission excitation function for 19F +194, 196, 198Pt reactions. (21st May 2021)

• Record Type: Journal Article
• Authors: Singh, Varinderjit; Behera, B R; Kaur, Maninder; Jhingan, A; Kaur, Rupinder; Sugathan, P; Siwal, Davinder; Goyal, S; Singh, K P; Pal, Santanu; Saxena, A; Kailas, S
• Is Part Of: Journal of physics. Volume 48:Number 7(2021)
• Publication Date: 2021-05-21
• Subjects: nuclear reactions -- fusion–fission reaction -- fission fragment angular distribution -- statistical model of nuclear reactions; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/abe8cd
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: Experimental fission cross-sections are reported for the 19 F + 194, 196, 198 Pt reactions populating an isotopic chain of compound nuclei comprising both closed and non-closed shell nuclei. The fission cross-sections are obtained at near and above Coulomb barrier energies by measuring fission fragment angular distributions. The present work aims to estimate nuclear dissipation and find its isotopic and shell closure dependence from statistical model (SM) analysis of experimental data. Pre-scission neutron multiplicity data for the same systems is also included in the SM analysis. An updated version of SM is used in the present analysis, which includes shell corrections in level density and fission barrier as well as the effect of collective enhancement of level density and orientation effect of the compound nucleus along the symmetry axis. An isotopic dependence of the dissipation strength fitting the fission excitation functions is observed. The pre-scission neutron multiplicity, however, is underestimated by the SM.