Assertion: positron | /r/CapableOf | form bound system
Facets:
value: before annihilation
type: TEMPORAL
value: under certain conditions
type: OTHER
Source sentences:
text: Under certain conditions, the positron and electron can, before annihilation, form a bound system that is analogous to a hydrogen atom and called positronium.
text: Under certain conditions, the positron and electron can, before annihilation, form a bound system that is analogous to a hydrogen atom and called positronium.
text: Under certain conditions, the positron and electron can, before annihilation, form a bound system that is analogous to a hydrogen atom and called positronium.
text: Under certain conditions, the positron and electron can, before annihilation, form a bound system that is analogous to a hydrogen atom and called positronium.