It instantly decays to other particles.
The crusts held radioactive uranium, the element that decays to thorium.
The bismuth, in turn, decays to a stable isotope, with "acceptable toxicity," according to the research.
It will be allowed to remain until it naturally decays to background levels, he said.
Two of the most challenging decay modes are those when the Higgs decays to b-quarks (where boosted Higgs bosons are especially imortant), and when it decays to tau leptons.
You can inject into a body a harmless compound containing an isotope which decays to produce a positron.
Mr. Xi used a Chinese aphorism — "worms come only after matter decays" — to stress his point.
This isotope decays to actinium-227 with a half-life of 32,760 years.
This isotope decays to protactinium-233, which in turn decays to uranium-233: The fissile properties of uranium-233 can be utilized immediately or after recovery from the irradiated reactor fuel.
The longest-lasting isotope, roentgenium-280, has a half-life of 3.6 seconds and decays to meitnerium-276.
Edward noted that Mr. Xi invoked a Chinese saying — "worms come only after matter decays" — to emphasize his point.
