Nke_a50 Nuclear Isotope Data shows the data on the known isotope states (about 3000 different nuclides). All stable nuclei and known radioactive nuclei, both naturally occurring and manmade, are loaded, along with their decay properties. Also decay spectra and neutron cross-sections and neutron fission yields are available. Nke_a50 loads data from binary file installed. No internet/phone connections required. The detailed information includes: Gamma-lines, Beta-\Electron spectra, Alpha-lines, Positron spectra, neutron cross-sections, Yields for thermal neutron induced fission, Yields for fast neutron induced fission. Nke_a50 is a twin of freeware Nke_a code.