We present a new nucleosynthesis process that we denote as the nu p process, which occurs in supernovae (and possibly gamma-ray bursts) when strong neutrino fluxes create proton-rich ejecta. In this process, antineutrino absorptions in the proton-rich environment produce neutrons that are immediately captured by neutron-deficient nuclei. This allows for the nucleosynthesis of nuclei with mass n...

The symmetry energy is an important quantity in the equation of state of isospin asymmetric nuclear matter. This currently unknown quantity is key to understanding the structure of systems as diverse as the neutron-rich nuclei and neutron stars. At TAMU, we have carried out studies, aimed at understanding the symmetry energy, in a variety of reactions such as, the multifragmentation of Here we ...

Received (received date) Revised (revised date) RMF + BCS description of drip-line nuclei Recently it has been demonstrated, considering Ni and Ca isotopes as prototypes, that the relativistic mean-field plus BCS (RMF+BCS) approach wherein the single particle continuum corresponding to the RMF is replaced by a set of discrete positive energy states for the calculation of pairing energy provides...

The possibility of performing nowadays reactions with beams of unstable nuclei has opened a new field of study in nuclear physics. Using stable nuclei as targets and carrying out the experiments in inverse kinematics it becomes possible to have access to the excitation spectrum of the incoming short-lived projectiles. To this aim the most often used reactions are the Coulomb excitation and the ...

Following from the prediction by Hilton and Mang [1] of “giant backbending” in 180Hf, caused by a collective oblate rotational band crossing the prolate ground-state band, there has been further theoretical investigation of this phenomenon [2–5]. The calculated shape change is understood to be induced by the effects of rotation alignment. It is related to the prediction of a ground-state shape ...

We investigate the possible signature of the presence of giant pairing states at excitation energy of about 10 MeV via two-particle transfer reactions induced by neutron-rich weakly-bound projectiles. Performing particle-particle RPA calculations on Pb and BCS+RPA calculations on Sn, we obtain the pairing strength distribution for two particles addition and removal modes. Estimates of two-parti...

Unlike their lighter counterparts, most odd-odd N = Z nuclei with mass A > 40 have ground states with isospin T=1, suggesting an increased role for the isovector pairing interaction. A simple SO(5) seniority-like model of this interaction reveals a striking and heretofore unnoticed interplay between likeparticle and neutron-proton isovector pairing near N = Z that is reflected in the number of ...

We report on a study of neutron-rich nuclei around 132 Sn in terms of the shell model employing a realistic effective interaction derived from the CD-Bonn nucleon-nucleon potential. We present results for some Sb and Te isotopes. Comparison shows that our results are in very good agreement with the available experimental data supporting confidence in the predictions of our calculations. This ma...

T. Kurtukian-Nieto, J. Benlliure, L. Audouin, B. Blank, F. Becker, E. Casarejos, D. Cortina, J. Giovinazzo, D. Henzlova, B. Jurado, M. F. Ordoñez, F. Rejmund, K.-H. Schmidt, O. Yordanov 1 Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain, 2. Institut de Physique Nucléaire, F-91406 Orsay cedex, France, 3 Centre d'Etudes Nucléaires Bordeaux-Gradignan, F-33175 Gradignan...

This work presents the first continuum shell-model study of weakly bound neutron-rich nuclei involving multiconfiguration mixing. For the single-particle basis, the complex-energy Berggren ensemble representing the bound single-particle states, narrow resonances, and the nonresonant continuum background is taken. Our shell-model Hamiltonian consists of a one-body finite potential and a zero-ran...