Radioactive decay
Radioactive repertoire is a process involving the loss of unstable atomic nucleus energy through an ionizing particle emission or radiation emission. This glow occurs randomly, without involving infringement with other particles. This decay, or energy loss, occurs on an atom called the parent nucleus, and then produces another type of atom called the child's nucleus. For example, a carbon-14 atom emits radiation, then turns into a nitrogen-14 atom. At the stage of keatoman, this is a stochastic process, according to quantum mechanics it is impossible to anticipate which atom will decay at a time. But if the same atom is in very large quantities, the decay rate can be expected on average. The SI unit for activity is becquerel. One Bq is defined as a transformation in every moment. Since a reasonable amount of radioactive material samples involve a very large number of atoms, one Bq is a very small activity size. The number in GBq or TBq order is more commonly used.