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The light output, α/β ratio, and pulse shape have been investigated at −25 • C with PbWO 4 crystal scintillators undoped, and doped by F, Eu, Mo, Gd and S. The fast 0.01 − 0.06 µs and middle 0.1 − 0.5 µs components of scintillation decay were observed for all the samples. Slow components of scintillation signal with the decay times 1 − 3 µs and 13 − 28 µs with the total intensity up to ≈ 50% have been recognized for several samples doped by Molybdenum. We found some indications of a pulse-shape discrimination between α particles and γ quanta with PbWO 4 (Mo doped) crystal scintillators.

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