Fig. 2From: Cerenkov luminescence imaging: physics principles and potential applications in biomedical sciences Left: Cerenkov threshold as a function of the refractive index of the radiator for a β particle (m 0 c 2=0.511 MeV). Right: Number of Cerenkov photons emitted per unit path length and per unit wavelength by a particle with charge e and β=0.9 in a medium with n(λ)=1.4Back to article page