N-Nuclides

Explore nuclear data with N-Nuclides, a scientific reference and analysis toolkit for iPhone, iPad, and Mac.

Browse an interactive chart of 3,558 nuclide ground states. Search for an isotope or element, inspect half-lives and decay relationships, and explore atomic masses, binding energies, and natural abundances where evaluated values are available.

Study decay chains and selected nuclear energy-level diagrams. View neutron cross-section tables and energy-dependent plots from bundled ENDF/B-VIII.1 evaluations, with state and reaction-channel choices where available. Source labels and coverage limits are retained.

Calculate macroscopic cross sections for natural or supplied isotope compositions. Explore reference densities for elements and common nuclear-engineering compounds, including water, uranium dioxide, uranium carbide, uranium nitride, and boron carbide. Results identify missing isotope or reaction coverage and the density assumptions used.

Explore evaluated fission product yields by isotope, incident energy and yield type, linked to the nuclide chart. Examine binary-channel mass ledgers, mass defects and energy equivalents when the required masses are available. Product yields are marginal yields; joint fragment-pair reaction probabilities are not supplied. Independent product mass distributions are available as scientific plots.

Export scientific figures and calculation reports, including vector PDF and standalone LaTeX, with source information and stated limitations. All included features are available with the paid app.

The evaluated data is bundled for offline reference. Source links open externally when selected. Estimates, missing values, and coverage limits are identified; the app does not contain every measurement or every energy-level scheme. No account is required, and the app contains no advertising or tracking analytics.

For education and scientific reference. Not certified for operational nuclear engineering, radiation protection, regulatory, or clinical decisions.