Double click on an isotope for more information.


Click and drag to move.
Double click to select.
Scroll to zoom.

The Colourful Nuclide Chart

The Colourful Nuclide Chart displays data from two evaluations, namely

The Ame2016 atomic mass evaluation
Chinese Physics C41, 030002 (2016)

The Nubase2016 evaluation of nuclear properties
Nucl. Phys. 41, 030001 (2016)

These databases are not reproduced in their entirety, and whilst the data displayed should be correct, no guarantee is given as to the accuracy of the presented information. If mistakes are spotted please let me know.


E-mail: edward [dot] simpson [at] anu [dot] edu [dot] au
Twitter: SuperSubatomic

Update (2018-11-06)

Switched to outline stable isotopes rather than colour them black. Added plotting of abundances.

Update (2018-07-31)

Fixed bug in half-lives (milli vs micro seconds).

Update (2018-06-21)

Prevent isotope selection when zoomed out on touch devices.

Update (2018-06-14)

Fixed a bug which caused high-precision half lives to be incorrect.

Update (2018-05-27)

Some recent updates include:

  • Updating to the latest AME and NuBase evaluations
  • Added the option to plot undertainties (where available)
  • Added zoom controls
  • Improved plotting of property differences
  • Improved touch device compatability
  • Added precise definition of min/max for colour ranges
  • Added the ability to export to a data table

If you have any feedback or feature suggestions, contact me via e-mail or twitter.

Display Options


Display Options

Isotope Labels

Off On Move Always On Always Off


Show advanced options

Export Chart and Data

Z: -
N: -

Note: The maximum image size is capped in order to prevent browser crashes, but this limit should be sufficiently high for essentially all purposes. Both Firefox and Internet explorer occasionally have problems rendering the whole chart below this cap.

Colour Options

Advanced Colour Options

Colour range:
Hue offset:
Minimum value:
Maximum value:


The Key can be moved around the chart by clicking a dragging it. By default it uses the Float mode - it will stay in the same place on the screen as you move around the chart. In Pin mode, it stays in the same place relative to the chart itself.

During export, the key should appear in the output image where it is on the chart and at the same relative size.


Advanced Options

Custom Colour Points (numeric only)

For more precise control, the mapping between the colour range and the data range can be altered. Below, the first numbers correspond to the point on the define range of colours, and the second number in the text box gives the corresponding fractional point between the minimum and maximum data values.


Data Selection

Nuclear Properties


Difference Modes

Single [D1(N,Z)] and double [D2(N,Z)] difference modes for quantity V(N,Z) are defined as follows:

D1 = [V(N+dN,Z+dZ)-V(N-dN,Z-dZ)]/2(dZ2+dN21/2
D2 = [V(N+dN,Z+dZ)-2V(N,Z)+V(N-dN,Z-dZ)]/2(dZ2+dN2)1/2

where dN and dZ are 0 or 1 in the case of D1 and 2 in the case of D2. The direction of the difference is set by the radio button. These differences approximate the first and second derivatives of quantity V(N,Z). For some introductory discussions on this see:

E. C. Simpson and M. Shelley
Nuclear cartography: patterns in binding energies and subatomic structure
Physics Education 52, 064002 (2017)

The Colourful Nuclide Chart

Putting the joy back into nuclear data.