Answer: scintillators

AnswerCrossword Clue
scintillatorsSCINTILLATOR, an instrument for detecting radioactivity; a phosphor that produces scintillations
scintillatorsA detector for charged particles and gamma rays in which scintillations produced in a phosphor are detected and amplified by a photomultiplier, giving an electrical output signal
scintillatorsA material that fluoresces when struck by a charged particle or high-energy photon