1. Geiger-Müller counter (Geiger counter): This is a classic and widely used instrument, particularly for detecting alpha, beta, and gamma radiation. It uses a gas-filled tube to detect ionizing radiation, producing audible clicks or a reading on a display.
2. Scintillation detector: This instrument utilizes a scintillating material (like sodium iodide) that emits light when struck by radiation. The light is then converted into an electrical signal, providing information about the type and intensity of the radiation.
3. Ionization chamber: This device measures the ionization caused by radiation in a gas-filled chamber. It's often used for measuring higher levels of radiation, such as in industrial settings.
4. Proportional counter: Similar to an ionization chamber, but it amplifies the signal from ionization events. This allows for better discrimination of different types of radiation.
5. Semiconductor detector: These detectors utilize semiconductors (like silicon or germanium) to create a charge when radiation interacts with them. They are highly sensitive and provide good energy resolution.
6. Neutron detector: Specifically designed to detect neutrons, these instruments use various methods, such as using boron-lined proportional counters or fission chambers.
The specific machine used depends on the type of radiation being measured, the desired level of sensitivity, and the application.
