"What quality factor"?
D000042:Absorption; D004735:Energy Transfer; D006283:Health Physics / Q000592:standards; D009502:Neutrons; D009678:Nuclear Energy; D009688:Nuclear Reactors; D011522:Protons; D011835:Radiation Protection; D011874:Radiometry / Q000592:standards*; D013057:Spectrum Analysis; D009626:Terminology as Topic
D011522:Protons