Americium 241 is commonly used to measure what?

Americium-241 is primarily utilized in applications that involve measuring moisture content in various materials. This isotope emits alpha particles and has a strong gamma radiation component which allows it to penetrate most substances, making it effective for moisture measurement in soil, concrete, and other construction materials. The radiation emitted can be detected and measured, providing a reliable indication of moisture levels.

This application is crucial in industries such as construction and agriculture, where knowing the moisture content can significantly influence material processing and quality assurance. While Americium-241 may play roles in other contexts, its primary and most common usage in nuclear gauges is as a moisture sensor, making it an essential tool in monitoring moisture levels.