Answer :
Final answer:
The Geiger-Muller detector is a gas-filled ionization chamber used for detecting ionizing radiation. It generates an electrical signal when the gas inside is ionized by radiation. This type of detector differs from scintillation detectors, as it uses gas rather than fluorescent materials.
Explanation:
Understanding the Geiger-Muller Detector
The Geiger-Muller detector is primarily classified as a gas-filled ionization chamber (Option A). This device detects ionizing radiation, such as alpha particles, beta particles, and gamma rays, by using gas which becomes ionized when radiation passes through it. As the ionization occurs, it generates an electrical pulse that can be counted to measure the level of radiation.
In contrast to scintillation detectors (Option C), which rely on fluorescent materials that emit light when struck by radiation, the Geiger-Muller detector specifically utilizes gas as its active medium, making it distinctly different. It's not considered a personnel monitoring device (Option B), although it can be used in portable applications for monitoring radiation levels.
Thus, the correct answer is that the Geiger-Muller detector is indeed a gas-filled ionization chamber and this places it squarely in the realm of radiation detection devices.
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