Emission of intermediate mass fragments from hot¹¹⁶Ba* formed in low-energy⁵⁸Ni +⁵⁸Ni reaction

Abstract

The complex fragments (or intermediate mass fragments) observed in the low-energy 58 Ni+ 58 Ni→ 116 Ba * reaction, are studied within the dynamical cluster decay model for s-wave with the use of the temperature-dependent liquid drop, Coulomb and proximity energies. The important result is that, due to the temperature effects in liquid drop energy, the explicit preference for α-like fragments is washed out, though the 12 C (or the complementary 104 Sn) decay is still predicted to be one of the most probable α-nucleus decay for this reaction. The production rates for non-α like intermediate mass fragments (IMFs) are now higher and the light particle production is shown to accompany the IMFs at all incident energies, without involving any statistical evaporation process in the model. The comparisons between the experimental data and the (s-wave) calculations for IMFs production cross sections are rather satisfactory and the contributions from other ℓ-waves need to be added for a further improvement of these comparisons and for calculations of the total kinetic energies of fragments.

Dynamical cluster-decay model for hot and rotating light-mass nuclear systems applied to the low-energyS32+Mg24Gupta1, Balasubramaniam2, Kumar3 et al. 2005Phys. Rev. CSelf Cite816482View full textAdd to dashboardCite

“…Using the decoupled approximation to R and η motions, the DCM defines the decay cross section, in terms of partial waves, as [21,22] …”

“…A recent attempt toward dynamically treating the decay of a hot and rotating nucleus has been made by Gupta and collaborators [19][20][21][22][23][24], who propose a dynamical collective clusterization process as a possible alternative of the fission process. Both the LPs and IMFs are considered as the dynamical mass motion of preformed fragments or clusters through the barrier.…”

Possible decay mechanisms of [sup 220]Ra∗ formed in carbon induced reaction

“…Based on the quantum mechanical fragmentation theory [4,5,6], the dynamical cluster-decay model (DCM) has been successfully applied to study the decay of hot and rotating nuclei formed in heavy ion reactions [7,8,9]. It is worked out in terms of the collective coordinates of the mass asymmetry, η=…”

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100Bansal1, Chopra2, Gupta3 et al. 2012Phys. Rev. C32080View full textAdd to dashboardCite

“…Seeger's constants at T = 0 are refitted by one of us (R.K.G.) and collaborators [38][39][40] by defining the experimental binding energy B of a nucleus as B = V LDM (T = 0) + δU . This procedure takes care of the missing deformation effects in Ref.…”