Is the statement "A UT detector consists of a piece of cellulose nitrate film packaged in a shielded container" true or false?

The statement is true. A uranium thermoluminescent (UT) detector does indeed consist of a piece of cellulose nitrate film that is packaged in a shielded container. This type of detector is designed to measure radiation exposure by utilizing the properties of the cellulose nitrate material, which retains energy from radiation interactions. When the film is subsequently heated, it releases this stored energy in the form of light, which can then be measured. The shielded container is crucial in ensuring that the detector only measures the intended radiation, minimizing interference from other sources. This design allows for accurate and reliable measurements of radiation levels, which is essential for radon detection and assessment.