Assertion: deuterium | /r/ObjectUse | used in fusion
Facets:
value: immediatly
type: MANNER
Source sentences:
text: To clarify on this: almost all of the deuterium found outside stars was formed in the big bang, but stellar fusion produces deuterium by beta decay then destroys it by fusion, unlike other isotopes created in stars, it is not scattered by supernovae as it is immediatly used in fusion.