Assertion: positron | /r/ObjectUse | used for research purposes
Facets:
Source sentences:
text: Positrons obtained from beta decay and pair production are used for research purposes.
text: Positrons obtained from beta decay and pair production are used for research purposes.
text: Positrons obtained from beta decay and pair production are used for research purposes.
text: Positrons obtained from beta decay and pair production are used for research purposes.