Scientists are looking at how to measure radon gas (Rn) in places where people handle radium and thorium to keep them safe.
A special device called a Lucas scintillation cell (LSC) is used to study radon, but how well it works depends on how the gas flows through it.
The researchers tested different flow rates and inlet needle lengths to find the best settings for the LSC, discovering that it works best with flow rates between 0.6 and 1 liters per minute and needle lengths from 22.5 to 45 mm.