Assertion: energy cosmic ray | /r/HasProperty | proton
Facets:
value: mostly
type: DEGREE
Source sentences:
text: The GZK limit is derived under the assumption that ultra-high energy cosmic rays are protons.
text: The GZK limit only applies if ultra-high-energy cosmic rays are mostly protons.
text: I read that the ultrahigh-energy cosmic rays that arrive to our atmosphere at 1020 electron volts (eV) or more, are mainly protons?