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Spinthariscope
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<p>A spinthariscope is a device for observing individual <a href="/facts/Radioactive_decay/Ya6FVjt4">nuclear disintegrations</a> caused by the interaction of <a href="/facts/Ionizing_radiation/vw0d9GaT">ionizing radiation</a> with a <a href="/facts/Phosphor/vTLjrGDE">phosphor</a> (see <a href="/facts/Radioluminescence/rsBBkXPK">radioluminescence</a>) or <a href="/facts/Scintillator/vhxA1Ufo">scintillator</a>. </p>