Emission of light charged particles and fission fragments from Hf⁎ and Pt⁎ nuclei

Abstract

Using dynamical cluster-decay model, the time scale of fission and light charged particles emitted in the decay of Hf⁎ and Pt⁎ nuclei is estimated. The decay analysis is carried out for isotopes and isobars of 170,174Hf⁎ and 170,174Pt⁎ nuclei. The structural information from the excited Hf⁎ and Pt⁎ nuclei is extracted using the fragmentation potential and preformation probability, which in turn accordingly influence the cross section yields. The cross sections of evaporation residue and fission-fragments are calculated by optimizing the neck length ΔR with in the frame work of dynamical cluster-decay model (DCM). The neck length ΔR provides significant information about the shape elongation of decaying fragments and in turn provides an insight of the reaction time scale. Applying momentum conservation, the velocity and time scale of fission fragments is calculated for 170Hf⁎ nucleus at temperature T=2.011MeV, which comes out of the order of (0.7–1)×10−21 s and the same for light charged particle is 0.5×10−21 s.