Fusion-fission dynamics of Pt188,190 through fission fragment mass distribution measurements

Measurement of mass-angle and mass-total kinetic energy distributions from the fission of 190Pt compound nucleus

“…To explore FF dynamics in the lighter pre-actinide region, an experiment was performed measuring the fission fragment emission angles and time of flight (TOF) distributions for the reactions, 28 Si+ 160 Gd and 12 C+ 178 Hf at different lab energies around and above the barrier. The mass width analysis of fragments mass distributions from the data was reported by Kavita et al [8]. In the present work, we have done the analysis by considering mass-angle and total kinetic energy distributions as observables to understand the fission dynamics of neutron deficient 190 Pt CN, which is situated in the newly discovered island of mass asymmetric fission.…”

“…Understanding the nuclear fusion-fission (FF) process is important for fundamental nuclear research as well as for its different applications [1][2][3]. Detailed understanding of heavy ion induced FF reaction dynamics is most essential for the synthesis of new super heavy elements [4][5][6][7][8][9][10][11]. The major competing process of FF is quasi-fission (QF) as it hinders the formation of compound nucleus (CN).…”

“…Quasifission is a fission-like process in which the composite system breaks apart before complete equilibration in mass and shape [12]; consequently, leading to anisotropic massangle distribution [10,13,14], broadening in the width of mass distribution [7][8][9][10] as well as deviation in the correlations of mass-total kinetic energy (TKE) distributions from liquid drop (LD) fission behaviour or the deviation from the LD model (LDM) predicted parabolic dependence of mean TKE on fragment mass [9,15]; which indicate the signature of quasifission events. Apart from QF, mass-asymmetric FF is also a predominant fission process, especially in the lighter pre-actinide region.…”

“…In such cases, distinguishability is made after the model comparison of the experimental data [16,17]. In this quest, various experimental studies have been performed using fission fragments mass distribution (FFMD) [7,8,[16][17][18][19][20], mass-TKE [15,[21][22][23][24][25] and mass-angle correlations [10,13,26] as key probes.…”

Search for Asymmetric Fission in Mass 200 Region: A Case Study in 197Tl

“…We have further analyzed the reported FF fragment mass distribution of a number of systems [12][13][14][15][16][17][18][19][20][21][22][23] including 195 Hg at similar excitation energies. We have compared the reduced standard deviation of the experimental fission fragment mass distribution for a number of systems near mass 200 region near Coulomb barrier energies and is shown in Fig.…”