What approximate voltage drop indicates the presence of radon in an Electret Ion Chamber?

The presence of radon in an Electret Ion Chamber is indicated by a specific voltage drop, which in this case is approximately 2 volts. This voltage drop occurs due to the ionization of air molecules in the chamber caused by the alpha particles emitted by radon decay. When radon gas enters the chamber, it ionizes the air, leading to a reduction in the electric field that the electret experiences. This, in turn, results in a measurable decrease in voltage, providing a reliable metric for assessing radon levels in a given environment.

Understanding the specific voltage drop associated with radon detection is crucial for accurate measurement and monitoring. A 2-volt drop is typically recognized as the threshold indicating significant levels of radon, and this information is essential for technicians to evaluate potential health risks and take appropriate actions for mitigation. Thus, the association of a 2-volt drop with the presence of radon showcases the effectiveness of Electret Ion Chambers in radon measurement.