A library to model nuclear physics in javascript. Intended for building visualizations and interactive demonstrations.

Get the decay products for the given isotope. The isotope parameter is a compact name like Pu-239.

radioactive.decay.products('Pu-239');

returns an array of products produced in the decay process:

[
    {
        fraction : 1,       // in the range [0, 1]
        product  : 'U-235'  // a compact isotope name
    },
    ...
]

Get the complete decay chain for the given isotope. The isotope parameter is a compact name like Y-99.

radioactive.decay.chain('Y-99');

returns an array of products produced in the decay process:

["Y-99", "Zr-99", "Nb-99m", "Nb-99", "Mo-99m2", "Mo-99m1", "Mo-99", "Tc-99m", "Tc-99"]

Get a decay profile of isotope mass for a starting charge of isotopes. The charge parameter is a dictionary of compact isotope names (like `Pu-239') to initial charges (kilograms) of that isotope.

radioactive.decay.mass({
    'Y-99' : 1 //kilograms
});

returns a function that can be passed time in years. That function will return a dictionary of isotope masses remaining at that time:

{
    'Y-99'  : 0.02, // kilograms
    'Zr-99' : 0.8, // kilograms
    ...other isotopes...
    'total   : 1   // kilograms
}

Get a decay profile of radioactivity for a starting charge of isotopes. The charge parameter is a dictionary of compact isotope names (like `Pu-239') to initial charges (kilograms) of that isotope.

radioactive.decay.radioactivity({
    'Y-99' : 1 //kilograms
});

returns a function that can be passed time in years. That function will return a dictionary of isotope masses remaining at that time:

{
    'Y-99' : 5510123, // becquerels
    ...other isotopes...
    'total : 14310123 // becquerels
}

This module isn't implemented yet. Simulating fission and neutron capture is a real-time process, and needs totally different math & datasets.

Things this module will need to know about

• Fission isotope spread
• Neutron absorption probabilities for different energies and istopes
• Energies and products released
• Geometry of the situation
• Accompanying thermal model would make it actually useful

Contributions are welcome!

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Copyright (C) 2013 Peter Reinhardt

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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