decays into by electron capture; however, a fully ionised decays into a bound state of by the process of bound-state ?^- decay.

Chemical bonds can also affect the rate of electron capture to a small degree (in general, less than 1%) depending on the proximity of electrons to the nucleus. For example, in ⁷Be, a difference of 0.9% has been observed between half-lives in metallic and insulating environments. This relatively large