In order to convert the light output of an inorganic scintillator to the deposited energy, the study of light output curves is very important due to its non linearity. We carried out experiments to investigate the light output response of NaI(Tl), CsI(Tl), GSO(Ce) and LYSO(Ce) crystals to intermediate-energy 4He and 12C beams from HIMAC at National Institute of Radiological Sciences. Scintillation efficiency was obtained in the wide energy range. It was found that a light output curve is represented using the peculiar scintillation efficiency despite it greatly changes its shape with different particles. In addition, it was found that scintillation efficiency was a function of the stopping power. Using the measured scintillation efficiency, the light output curves of the crystals were systematically reproduced.
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