Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 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 radon gas concentrations. The inside of the gas chamber is coated with silver-activated zinc sulfide or ZnS(Ag) that scintillates or shines when struck by alpha particles. A photomultiplier tube at the top of the chamber counts the photons and sends the count to the data logger or counter.

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