Radioactive Decay Quotes & Sayings

Everyone should be very grateful radioactivity exists at all. It can kill you, yes, but without it you wouldn't have been born in the first place. On Earth, deep under your feet, our planet happens to contain many atoms that do decay, all the time. Less so now than in the past, but still, Earth's mantle is radioactive. When atoms decay there, the particles they emit bump into their neighbours and generate heat, the very heat that contributes to keeping our planet warm. Without radioactivity, there would be no seismic or volcanic activity. The surface of the Earth would have been dead cold billions of yeras ago. Life as we know it would probably not exist at all. — Christophe Galfard

I listen to a radio segment about scientists measuring the radioactive decay after such large-scale catastrophes as September 11 or the 2003 tsunami in Indonesia. It turns out that nuclear decay, which is, if not a constant, as close to such a thing as we can get, inexplicably increases after these events. As if contingent matter echoed or shadowed or even shared our sufferings (and our joys?). As if creation itself cried out with us. — Christian Wiman

Connection between life and radioactive nuclei is straightforward. No life without tectonic activity, without volcanic activity. And we know very well that geothermal energy is mostly produced by decay of uranium, thorium, and potassium. — Garik Israelian

The discovery of the neutron was a crucial step in understanding nuclei, including radioactive ones. For example, beta decays are the transformation within a nucleus of a nucleon of one type, either a proton or a neutron, to the other. You may wonder how a proton can decay to a neutron if the neutron is heavier than the proton; conservation of energy would seem to make this impossible. However, while a proton not bound in a nucleus cannot transform to a neutron, it is possible in some circumstances for a proton within a nucleus to do so. This is because the proton can use the additional energy from the force that binds nucleons in the nucleus. Beta decay occurs if it results in the total energy of the final atom, taking into account the energy due to binding, being lower that that of the initial atom. The same applies to a neutron bound in a nucleus, whereas a free neutron can always decay to a proton. — Brian R. Martin