Scintillation counter
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A scintillation counter is an instrument for detecting and measuring ionizing radiation by using the excitation effect of incident radiation on a scintillating material, and detecting the resultant light pulses.
Apparatus with a scintillating crystal, photomultiplier, and data acquisition components.
Scintillation probe being used to measure surface radioactive contamination. The probe is held as close to the object as practicable
Hand-held large area alpha scintillation probe under calibration with a plate source in a bench calibration jig.
Hand-held scintillation counter reading ambient gamma dose. The position of the internal detector is shown by the cross
Scintillator
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A scintillator is a material that exhibits scintillation, the property of luminescence, when excited by ionizing radiation. Luminescent materials, when struck by an incoming particle, absorb its energy and scintillate. Sometimes, the excited state is metastable, so the relaxation back down from the excited state to lower states is delayed. The process then corresponds to one of two phenomena: delayed fluorescence or phosphorescence. The correspondence depends on the type of transition and hence the wavelength of the emitted optical photon.
Scintillation crystal surrounded by various scintillation detector assemblies
Extruded plastic scintillator material fluorescing under a UV inspection lamp at Fermilab for the MINERνA project
Various scintillation crystals. The second crystal from the left is targeted by an UV source and shines brightly in visible light.
Alpha scintillation probe for detecting surface contamination under calibration