Assertion: cosmic ray's electron | /r/HasProperty | beta particles
Facets:
Source sentences:
text: Some are electrons (beta particles), gamma rays or photons and a tiny fraction are even heavier particles.
text: Almost 90% of all the incoming cosmic ray particles are protons, about 9% are helium nuclei (alpha particles) and about 1% are electrons (beta minus particles).
text: Some are electrons (beta particles), gamma rays or photons and a tiny fraction are even heavier particles.