Noun
radioactive decay of an atomic nucleus that is accompanied by the emission of an alpha particle
Source: WordNetAll of these decay only through alpha decay, although some unknown bohrium isotopes are predicted to undergo spontaneous fission. Source: Internet
All of these decay only through alpha decay and spontaneous fission, with the single exception of seaborgium-261 that can also undergo electron capture to dubnium-261. Source: Internet
By 1928, George Gamow had solved the theory of alpha decay via tunneling. Source: Internet
Despite having a similar half-life to the previous isotope (8.1 hours for astatine-210 and 7.2 hours for astatine-211), the alpha decay probability is much higher for the latter: 41.81% against only 0.18%. Source: Internet
For example, at over 1.9 × 10 19 years, over a billion times longer than the current estimated age of the universe, bismuth-209 has the longest known alpha decay half-life of any naturally occurring element. Source: Internet
Francium-221 then decays into astatine-217 by alpha decay (6.457 MeV decay energy). Source: Internet