Evaluation of undoped zinc sulfide crystal scintillator

Undoped ZnS crystal was evaluated on its scintillation characteristics. In optical transmittance, high transparency of 70% was observed from UV to near infrared wavelengths. In X-ray induced radioluminescence, two intense peaks appeared at 430 and 520 nm. When ²⁴¹ Am was irradiated, its scintillation light yield resulted 500 ph/5.5 MeV-α.