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.
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].
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.
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.
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.
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.
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.
116787068
An Approach to Measurement in Quantum Mechanics
We consider an unconventional approach to the measurement problem in quantum mechanics — we treat the apparatus as a classical system, belonging to the macro-world.