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This is the slowest radioactive decay ever spotted

It takes 1 trillion times the age of the universe for a xenon-124 sample to shrink by half

two-neutrino double electron capture

STRANGE DECAY  In a first, scientists have directly detected an extremely rare type of radioactive decay called two-neutrino double electron capture.

XENON Collaboration

By Maria Temming

- More than 2 years ago

For the first time, researchers have directly observed an exotic type of radioactive decay called two-neutrino double electron capture.