Possible Unified Interpretation of Heavy Nuclei

The data for five mass regions from $A=100-200\mathrm{}$ are plotted against the valence-nucleon product $N_p{N}_n$. They are found to display a remarkable similarity, heretofore unrecognized, which suggests a unified interpretation in terms of the strength of the proton-neutron interaction and which also leads to a better understanding of the $A=190\mathrm{}$ region.