Final answer:
Personal dosimeters are personnel radiation monitors that provide an immediate reading and are more sensitive and reliable than film badges. They detect the amount of radiation by the discharge of a rechargeable internal capacitor.
Step-by-step explanation:
Personal dosimeters are the personnel radiation monitors that provide an immediate reading. These dosimeters are designed to detect the amount of radiation by the discharge of a rechargeable internal capacitor. The amount of discharge is related to the amount of ionizing radiation encountered, providing a measurement of dose. These dosimeters are more sensitive and reliable than film badges and can be used to determine personal radiation exposure.