Scintillation in LAr

    The light yield in LAr is few 10,000’s of photons per MeV, which is dependent on E field, particle type and purity. The wavelength of emission is peaked at 128 nm. The scintillation light has two characteristic time constants: fast component of 6 ns and slow component of 1500 ns. Argon is highly transparent to its own scintillation light.