Anna Susalla, University of Notre Dame

Title: Predictions of Masses Far From Stability

Authors: A. Susalla, A. Aprahamian (University of Notre Dame)

Abstract:   A simple phenomenological model is developed for the prediction of the masses of nuclei far from stability. The model is based on the separation of macroscopic and microscopic effects. The microscopic component is quantified by the interaction between valence protons and neutrons and their contribution to complex nuclear structure properties such as deformation. The model can predict, by very simple calculations, properties of unknown nuclei. The quantity that is calculated for each nucleus is a term called P, where P=Np*Nn/Np+Nn. Parameter P has been correlated in various mass regions with the semi-empirical microscopic masses of known nuclei. The same correlations and P can now be used to predict unknown masses. This model has recently been used in predictions of the masses of unstable isotopes of Cadmium far from stability all the way to A=124.  This simple model may be of great importance for the astrophysical r-process in predicting masses of neutron rich nuclei as well as the rp-process for proton rich or N=Z nuclei.