Antimatter waste

Antimatter waste (also known as contaminated antimatter) is a byproduct of inefficient or primitive antimatter reaction techniques. As such, antimatter waste is nonreactive with normal matter and emits highly hazardous theta radiation, necessitating disposal as a toxic waste.

By the 24th century, Federation science had developed radiometric converter technology which can recycle antimatter waste, absorbing the theta radiation and converting it into energy and purifying the antimatter back into a usable reactant.