Nuclear Toolkit

Sep 18, 2026

> Metastable isomers are here. All 661 of them — including Tc-99m, Ba-137m and
> Ag-110m — are now selectable in the decay and chain calculators, with their
> own decay chains and a panel on every nuclide in the chart.
>
> Neutron cross sections added: thermal values and resonance integrals for 40
> isotopes, shown on the nuclide detail sheet with their source.
>
> Data from the IAEA Live Chart (ENSDF). Everything stays free.