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SCINTILLATION COUNTERS
These are older Radiation detectors that uses a crystal that flashes a small amount of light each time a particle collides with it. The light is detected by using a very sensitive device called a Photo-Multiplier.that changes each flash into a electrical pulse. The pulses are averaged and displayed using a meter that gives a reading that indicates the strength of the radiation.
Sodium Iodide
crystal.
The crystal is approximately one inch in diameter and one inch long with a window at one end. Because radiation can enter the crystal at any point, the light flash may have to travel through a different amount of the crystal to get to the P.M.Tube. This means that some flashes of light will be dimmer. As a result the electrical pulses coming from the P.M. Tube will have different amplitudes. Before the pulses can be averaged they must have the same amplitude. The major part of the circuits in the counter are used to accomplish this. Ask for more information at: agoshy@e-mtech.com