This line of research is dedicated to the study of the structure in unstable nuclei. The unstable nuclei with very short life time are rare compared the well bound nuclei that surround us. This short-live nuceli have exotic properties. These exotic nuclei are produced naturally in celestial bodies like neutron stars and they are now artificially produced in laboratories. The theoretical analysis of such systems seek to understand their properties and predict their behavior. We develop new formalisms to study such exotic nuclei.