- Lucas cell
A Lucas cell is a type of
scintillation particle detector. It is used to grab a gas sample, filter out the radioactive particulates through a special filter and then count the radioactive decay. It is frequently used to measure radongas concentrations. The inside of the gas chamber is coated with silver-activated zinc sulfideor ZnS(Ag) that scintillates or shines when struck by alpha particles. A photomultipliertube at the top of the chamber counts the photonsand sends the count to the data logger or counter. Radonitself is an inert gas. Its danger lies in the fact that it is radioactive and its radioactive daughters accumulate in the dust of enclosed areas. The radon daughters may lodge in the lungs and bombard them with alpha and beta radiation.
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