Eur. Phys. J. A (2017) 53: 133
https://doi.org/10.1140/epja/i2017-12323-5

Regular Article - Experimental Physics

Binary fragmentation based studies for the near super-heavy compound nucleus ²⁵⁶Rf

¹ Department of Physics, Panjab University, 160014, Chandigarh, India
² Inter University Accelerator Centre, Aruna Asaf Ali Marg, 110067, New Delhi, India
³ Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India
⁴ Department of Nuclear Physics, Andhra University, 530003, Visakhapatnam, India
⁵ Nuclear Physics Division, Bhabha Atomic Research Centre, 400085, Mumbai, India
⁶ CS, 6/1, Golf Green, 700095, Kolkata, India
⁷ Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia
⁸ Department of Physics, National University, 100174, Tashkent, Uzbekistan

^* e-mail: bivash@pu.ac.in

Received: 31 December 2016
Accepted: 22 May 2017
Published online: 22 June 2017

Abstract

Binary fragmentation of the near super-heavy compound nucleus ²⁵⁶Rf has been studied through the reaction ⁴⁸Ti + ²⁰⁸Pb at a bombarding energy well above the Coulomb barrier. For a better understanding of its reaction dynamics, the mass distribution, mass-energy distribution and mass-angle distribution of the fission fragments produced from ²⁵⁶Rf have been investigated thoroughly. The masses and kinetic energies of the fission fragments were reconstructed event-by-event from their measured velocities and emission angles. From the mass-energy analysis, a sizeable contribution from the asymmetric fission was observed on the edges of symmetric mass distribution. Evidence of asymmetric fission was also clued from the observed correlation between the masses and emission angles of the fission fragments. Contribution of the quasi-fission products has also been estimated by performing the theoretical dinuclear system calculations.