NUCLEON-NUCLEON INTERACTION IN RHENIUM- 186Re.

Abstract

Properties of nuclear matter and large finite nuclei have been studied using different types of nucleon-nucleon (NN) interaction potential. In this study, focus is on the thermodynamic properties of a large nucleus of Rhenium ( Re 186 75 ) using NN-interaction potential. Rhenium has been chosen because of its applications in technology, it’s used in engines of airplanes, missiles and high temperature thermo-couplers thus it may equally have an application at lower temperatures. The NN-interaction is used as a perturbation and general methods of quantum mechanics as well as many-body techniques have been used to calculate the energy, the heat capacity and the entropy. It is found that the heat capacity exhibits a phase transition at a critical temperature of 0.144K. The heat capacity increases linearly with increase in excitation energy at constant temperature and this is due to changes in the internal energy of nuclei. The entropy of the nuclei increases linearly with temperature and becomes zero at absolute 0K. These results suggests the possibility of Rhenium, a fermi system exhibiting superfluid properties below the critical temperature Tc~0.144K.