Map of decay modes
This map of the various nuclei is coloured with regards to the types of decay they undergo. Stable nuclei, self-evidently found along the stability line, are in black. The beta-emitters can be found on either side of this curve – beta negatives (in blue) occur in neutron-heavy nuclei, whereas beta-positives (in orange) occur in proton-heavy nuclei. At the right-hand side of the graph, the line of stability is replaced by a zone where alpha-emitters (in yellow) predominate. One can also see some exceedingly heavy particles (very far from the line of stability) which undergo spontaneous fission (in green), and a few nuclei which emit either protons (in red) or neutrons (in purple)