119284147
The role of surface energy coefficients and nuclear surface diffuseness in the fusion of heavy-ions
We discuss the effect of surface energy coefficients as well as nuclear surface diffuseness in the proximity potential and ultimately in the fusion of heavy-ions. Here we employ different versions of surface energy coefficients. Our analysis reveals that these technical parameters can influence the fusion barriers by a significant amount. A best set of these parameters is also given that explains the experimental data nicely.
119819646
Study of balance energy in central collisions for heavier nuclei
Abstract Using the quantum molecular dynamics model, we analyze the disappearance of flow in heavier colliding nuclei. A power law mass dependence ( ∝1/ A ) is obtained in all the cases. Our results are in excellent agreement with experimental data which allows us to predict the balance energy for 238 U+ 238 U collision around 37–39 MeV/nucleon.
119413477
Momentum dependent interactions and the asymmetry of the reaction: Multifragmentation as an example
120299866
Does the reduction of the mass in the medium enhance the production of antiprotons in high-energy nuclear reactions?
We investigate the role of medium effects on the production of antiprotons in nucleus-nucleus collisions at subthreshold energies. The reaction dynamics is simulated within the framework of quantum molecular dynamics. The antiprotons, produced through elementary baryon-baryon processes, are propagated in its time-dependent self-consistent mean field. Both absorption and rescattering by the baryonic environment are evaluated dynamically. The density and temperature dependence of the associated scalar and vector self-energies are calculated on the basis of an effective Nambu-Jona-Lasinio model. We found that the inclusion of the self-energies enhances the production of antiprotons. The calculated spectra are in good agreement with the experimental data and consistent with the formation of a very hot phase from which antiprotons are produced.
118224579
Energy of vanishing flow: mass-isospin dependence
We study the effect of isospin degree of freedom on balance energy throughout the mass range between 50 and 350 for two sets of isotopic systems with N/Z = 1.16 and 1.33 as well as isobaric systems with N/A = 1.0 and 1.4. Our findings indicate that different values of balance energy for two isobaric systems may be mainly due to the Coulomb repulsion. We also demonstrate clearly the dominance of Coulomb repulsion over symmetry energy.
2701312
Study of equilibrium using collision dynamics
We discuss the possibility of equilibrium (and thermalization) in heavy-ion collisions at intermediate energies within a transport model. This was achieved by dividing the nuclear matter into different collision zones. We find that those nucleons which experience at least ten collisions are close to complete equilibrium whereas others never achieve any equilibrium.
121041049
Transverse momenta of secondaries from 200 GeV/c proton-nucleus interactions
A study of 100 interactions, produced by secondary particles from 200 GeV/c proton interactions in nuclear emulsions, has been made to estimate the transverse momenta of the secondary particles. The data have been analysed by different methods of energy estimation and the weighted average values ofpt have been compared as estimated from various methods. An average value ofpt equal to 0.38 ± 0.03 GeV/c, in proton-nucleus interactions at 200 GeV/c, has been obtained from the production mechanism method.