Systematic study of multifragmentation in asymmetric colliding nuclei

Abstract

We present a complete systematically theoretical study of multifragmentation for asymmetric colliding nuclei for heavy-ion reactions in the energy range between 50 MeV/nucleon and 600 MeV/nucleon by using soft and hard equations of state. This study is performed within an isospindependent quantum molecular dynamics model. To see the effect of mass asymmetry, simulations are carried out in the absence of Coulomb interactions. Coulomb interactions enhances the production of fragments by about 20%. We envision an interesting outcome for large asymmetric colliding nuclei. Although nearly symmetric nuclei depict a well known trend for rising and falling with a peak around E= 100 MeV/nucleon, this trend, however, is completely missing for large asymmetric nuclei. Therefore, experiments are needed to verify this prediction.

Role of different nuclear charge radii parameterizations on the thermal equilibrium in nuclear reaction

“…η = 0.0 and η = 0.0 corresponds to mass symmetric and asymmetric nuclear reactions respectively. The study of these reactions (by keeping the total mass of the system same), actually conveys the structural effects where the total number of nucleons are equal with different combinations of the size of projectile and target nuclei [4]. From the literature, it has been concluded that the nuclear reaction dynamics is very much sensitive towards the structural effects.…”

Probing the Effect of Different Cross Sections in Asymmetric Systems

“…We will trace this effect on the mass-asymmetric systems. The mass asymmetry of a reaction can be defined by the asymmetry parameter η = |(A T − A P )/(A T + A P )| [9], where A T and A P are the masses of the target and the projectile, respectively. The case η = 0 corresponds to the symmetric reactions, whereas nonzero values of η define various asymmetries of a reaction.…”

Multifragmentation at the balance energy of mass-asymmetric colliding nuclei

“…In a recent study by Puri and collaboration, a detailed analysis is presented on the effect of mass asymmetry of colliding nuclei on the collective flow and its disappearance, nuclear stopping, elliptical flow, multifragmentation (at fixed energies), and nuclear dynamics (at the balance energy E bal ; i.e. energy at which collective flow disappears) by keeping the total mass of the system fixed and at different impact parameters [8,9]. A sizeable role of mass asymmetry has been found in all the cases.…”

“…The mass asymmetry of the reaction is varied by keeping the total mass of the system fixed. The quantum molecular dynamics (QMD) model [1][2][3][5][6][7][8][9][10][11][12] is used for the present study and is explained in section II. Section III is devoted to the results and discussion followed by summary in section IV.…”