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Disintegration Constant — Description
The term disintegration constant, in the strict sense, is a proportionality constant in the mathematical equation that describes the rate of radioactive decay. All radioactive decay can be expressed quite well with statistics…which is pretty interesting, if you think about the fact that the process of radioactive decay at the individual level is a spontaneous disintegration of an atomic nucleus. Each disintegration event itself is random. Again, we see this notion of tiny random events at the smallest level taking a definable and predictable form in large scales.

What’s even more interesting about radioactive decay itself is that it’s happening all the time, all around you. Cinder blocks, for instance, are radioactive. Bananas contain trace amounts of the radionuclide potassium-40. Even human beings themselves have radioactive isotopes in their bodies from birth. Radioactivity is everywhere. (Fortunately for us, the cells in our bodies are able to repair the small amounts of damage caused by the radioactivity we’re exposed to on a daily basis).

It can be said that in a broader sense, on a long enough timescale, almost everything disintegrates. With the exception of the fundamental particles of electrons, protons, photons, and neutrinos, all particles are subject to decay. It may not happen quickly, but it most likely will happen.