Explain how a scintillation counter works.
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, (i.e. re-emit the absorbed energy in the form of light).
The scintillation counter is a solid state radiation detector which uses a scintillation crystal(phosphor) to detect radiation and produce light pulses. Figure 24 is important in the explanation of scintillation counter operation.As radiation interacts in the Figure below. Electronic energy band of an Ionic Crystal scintillation crystal, energy is transferred to bound electrons of the crystal’s atoms. If the energy that is transferred is greater than the ionization energy, the electron enters the conduction band and is free from the binding forces of the parent atom.This leaves a vacancy in the valence band...