Man uses Equipment, number 14

A man in a white lab coat is inserting samples into a 'Auto-Gamma Scintillation Spectrometer' machine. Physical description: black-and-white negatives, 6X6.5mmAuto-Gamma scintillation spectrometer is used to detect and measure radioactive decay. The scintillator generates photons in response to incident radiation. Then, a photomultiplier converts those photons into an electrical signal therefore producing a series of pulses. Each pulse corresponds to the decay of a single nucleus. Liquid scintillation is simply mixing a radioactive material with a liquid scintillator material