Assertion: positron | /r/CapableOf | produce pairs of 511 kev photons
Facets:
value: to that
type: OTHER
value: in a process
type: TEMPORAL
Source sentences:
text: These positrons soon find an electron, undergo annihilation, and produce pairs of 511 keV photons, in a process similar (but much lower intensity) to that which happens during a PET scan nuclear medicine procedure.[citation needed]