Tapas Sil

Superheavy nuclei in a relativistic effective Lagrangian model

Isotopic and isotonic chains of superheavy nuclei are analyzed to search for spherical double shell closures beyond Z= 82 and N= 126 within the new effective field theory model of Furnstahl, Serot, and Tang for the relativistic nuclear many-body problem. We take into account several indicators to identify the occurrence of possible shell closures, such as two-nucleon separation energies, two-nucleon shell gaps, average pairing gaps, and the shell correction energy. The effective Lagrangian model predicts N= 172 and Z= 120 and N= 258 and Z= 120 as spherical doubly magic superheavy nuclei, whereas N= 184 and Z= 114 show some magic character depending on the parameter set. The magicity of a particular neutron (proton) number in the analyzed mass region is found to depend on the number of protons (neutrons) present in the nucleus.

Effects of self-consistency violation in Hartree-Fock RPA calculations for nuclear giant resonances revisited

We provide accurate assessments of the consequences of violations of self-consistency in Hartree-Fock-(HF) based random-phase approximation (RPA) calculations of the centroid energy

Atomic parity nonconservation, neutron radii, and effective field theories of nuclei

{E}_{\mathrm{cen}}

Versatility of field theory motivated nuclear effective Lagrangian approach

of isoscalar and isovector giant resonances of multipolarities

Nuclear shape transition at finite temperature in a relativistic mean field approach

L=0\ensuremath{-}3

Shape transition in some rare earth nuclei in relativistic mean field theory

in a wide range of nuclei. This is done by carrying out highly accurate HF-RPA calculations neglecting the particle-hole (p-h) spin-orbit or Coulomb interaction in the RPA and comparing with the fully self-consistent HF-RPA results. We find that the shifts in the value of

Liquid-gas phase transition in nuclei in the relativistic Thomas-Fermi theory

{E}_{\mathrm{cen}}

Isospin-rich nuclei in neutron star matter

because of self-consistency violation associated with the spin-orbit and Coulomb interactions are comparable or larger than the current experimental errors in

Homotopy perturbation method in quantum mechanical problems

{E}_{\mathrm{cen}}

Sum rule approach to the isoscalar giant monopole resonance in drip line nuclei

.