117560530
Confrontation of QMD model with the experimental data for $^{40}Ar$ +$^{45}$Sc, $^{197}Au$ +$^{197}$Au and $^{129}Xe$ +$^{119}$Sn reactions
In the present work, we make confrontation of our theoretical calculations using quantum molecular dynamics model with the experimental data for the reactions of $^{40}Ar$ +$^{45}$Sc, $^{197}Au$ +$^{197}$Au and $^{129}Xe$ +$^{119}$Sn at different incident energies. In these reactions, we display the charge distribution and energy dependence of fragments multiplicity. Our results indicate good agreement with the experimental data for all the reactions.
118386846
Collective flow and balance energy in asymmetric heavy-ion collisions
Heavy-ion collisions at intermediate energy provide a useful tool to determine the nuclear matter equation of state as well as in-medium nucleon-nucleon (nn) cross-section. One of the most promising phenomena that can be helpful in this context is the disappearance of transverse in-plane flow. At low incident energies, the dominance of attractive interactions results in the emission of particles into backward hemisphere which leads to negative transverse in-plane flow whereas at higher incident energies, the particles are emitted into forward hemisphere resulting in positive flow. As one goes from low incident energy to higher one there exist a particular energy at which the net transverse in-plane flow disappears. This energy is termed as the energy of vanishing flow (EVF) [1, 2]. Up to now, one has measured the energy of vanishing flow in the reactions of C+C, Ne+Al, Ar+Al, Ar+Al, Ar+Sc, Ar+V, Zn+Al, Ar+Ni, Zn+Ti, Ni+Ni, Fe+Fe, Zn+Ni, Kr+Nb, Nb+Nb, Xe+Sn, La+La, and Au+Au [3]. However most of the reactions studied are nearly symmetric. Since, the dynamics of heavy-ion reactions also depends on asymmetry of the reaction [4]. We therefore, aim to study the transverse in-plane flow as well as its disappearance for different colliding nuclei with varying asymmetry. We plan to address this question using quantum molecular dynamics (QMD) model [5].
115690807
On the study of momentum correlations in fragmentation in heavy-ion collisions
The role of momentum correlations in fragmentation is studied within the framework of quantum molecular dynamics model. Our study is carried out by imposing momentum cut in the clusterization algorithm. The study reveals a strong effect of momentum cut in the fragmentation pattern. A comparison with experimental data is also presented. Our theoretical results are in agreement with the experimental data.
64603470
Dependence of balance energy on isospin degrees of freedom
Using the isospin-dependent quantum molecular dynamics model we study the isospin effects on the disappearance of flow for the reactions of 58Ni+58Ni and 58Fe+58Fe as a function of impact parameter. We found good agreement between our calculations and experimentally measured energy of vanishing flow at all colliding geometries. Our calculations reproduce the experimental data within 5%(10%) at central (peripheral) colliding geometries.
55890103
Phase-space analysis of fragments formed in heavy-ion collisions
We study the effect of momentum-dependent interactions and a broader Gaussian on multifragmentation. We also look into the details of the fragment structure for a broader Gaussian and momentum-dependent interactions. We find that nucleons forming the fragments belong to the same region of the phase space.
118068969
Role of isospin degree of freedom on the mass dependence of balance energy
The effect of isospin degree of freedom on balance energy and its mass dependence has been studied for the mass range between 50 and 350. Our results shows the dominance of Coulomb potential in isospin effects.
122973795
Model-independent study of light-cone current commutators
An attempt is made to extract information on the nature of light-cone current commutators (LCC) in a model-independent manner. Using simple assumptions on the validity of the Deser-Gilbert-Sudarshan (DGS) representation for the structure functions of deep-inelastic scattering and using the Bjorken-Johnson-Low theorem we show that in principle the LCC may be constructed knowing the experimental electron-proton scattering data. On the other hand, the scaling behavior of the structure functions is utilized to study the consistency of a vanishing value for various LCC under mild assumptions on the behavior of the DGS spectral moments.
121399825
Interaction between classical and quantum systems: A new approach to quantum measurement. III. Illustration
Following the approach to quantum measurement, proposed in an earlier paper, in which the apparatus is treated as a purely classical instrument to be described by the laws of classical mechanics we examine some simple experiments for the purpose of illustration. The Stern-Gerlach experiment is examined in detail, within our approach, and we see explicitly how the relevant information is transferred to the apparatus variables. We also examine a magnetic interferometer arrangement and a crossed-field arrangement. Consideration of these experiments leads us to the inclusion of an extra procedural step in our approach. This extra step is necessary so that an observer may measure the classical apparatus variables at will after the interaction is completed.