η in the nuclear medium within a chiral unitary approach Abstract The self-energy of an η meson in the nuclear medium is calculated in a chiral unitary approach. A coupled channel Bethe-Salpeter equation is solved to obtain the effective η-N interaction in the medium. The base model reproduces well the free space π-N elastic and inelastic scattering at the η-N threshold or N * (1535) region. Th...

time-dependent schrödinger equation for a 1-d model of hydrogen molecular ion h2+ in intenselaser field linearly polarized along the molecular axis is solved. ionization rates are calculated for differentinitial states. the evolution of electronic wavefunction at fixed inter-nuclear separations are simulated andanalyzed. the results obtained for the ground state of this 1-d model of h2+ show ap...

Nuclear-grade zirconium alloys properties are very similar to those of pure (Zr), because in most cases they contain more than 95% Zr atoms. They have extensive application nuclear industry, especially fuel cladding. Lattice and Zr-1%Nb alloy been explored this study. Point defect formation energies also calculated. Then, di-vacancies considered check the cluster vacancy production. In next sec...

We present and discuss a systematic calculation, based on two-loop chiral perturbation theory, of the pion-nuclear s-wave optical potential. A proper treatment of the explicit energy dependence of the off-shell pion self-energy together with (electromagnetic) gauge invariance of the Klein-Gordon equation turns out to be crucial. Accurate data for the binding energies and widths of the 1s and 2p...