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How Do X Ray Detectors Work. The scintillation detector comprises of nai (tl) crystal (scintillator) fixed tightly on a photomultiplier tube in a gamma ray spectrometer. Should the preset thresholds be exceeded, the alarm system is activated.
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When high voltage is applied to that tube, electrons are generated. Light strikes a thin photocathode which emits electrons into the vacuum portion of a photomultiplier tube. The scintillation detector comprises of nai (tl) crystal (scintillator) fixed tightly on a photomultiplier tube in a gamma ray spectrometer.
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Generally the photons are absorbed by the detector material and energy transfer takes place by ionization. Detectors are designed from these materials by attaching photomultiplier tubes to read the flash of visible light. The scintillation detector comprises of nai (tl) crystal (scintillator) fixed tightly on a photomultiplier tube in a gamma ray spectrometer.
Below Is An Illustration Of A Typical Metal Detector Coil System.
Should the preset thresholds be exceeded, the alarm system is activated. In some materials, these electrons will have enough energy to be freed of their host. When high voltage is applied to that tube, electrons are generated.
Light Strikes A Thin Photocathode Which Emits Electrons Into The Vacuum Portion Of A Photomultiplier Tube.
For detection and measurement of gamma rays one inch or more thick scintillator in used. That electron can rattle around in the detector and give energy to other electrons. Photoelectrons are accelerated in steps, striking dynodes and becoming ampli ed.
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