What is Radiation Detector?

Radiation detector also known as radiation dosimeter, is a device used to detect, and measure absorbed radiation dose. There are several types of radiation dosimeters such as TLD, OSL and film dosimeters. However NRDC is focusing on the solid-state detectors / sensors which are especially based on MOSFET structures.

How Does Solid-State Detector Work?

Solid-State detector also called Semiconductor Radiation Detector in which a semiconductor material such as a silicon or germanium crystal constitutes the detecting medium. One such device consists of a p-n junction or Schottky junction across which a pulse of current develops when a particle of ionizing radiation traverses it. The calibrated intensity of the current gives the amount of radiation dose.

Application of Radiation Detectors

Radiation dosimeter can be used all radiation environments. Ionizing radiation, such as beta rays, alpha ray, and gamma ray, cannot be detectable by the human senses, thus a dosimeter is used to detect and measure this, Ionizing radiation damage to the body is cumulative therefore, workers exposed to radiation, especially astronauts, nuclear power plant workers, doctors in radiotherapy, are required to dosimeters.


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