Answer :
Quench gas is used in Geiger-Muller counters to prevent continuous discharge or "afterglow" of the detector.
After a particle ionizes the gas in the counter, the quench gas quickly absorbs the excess energy and stops the ionization process, allowing the detector to reset for the next measurement. This ensures that the detector operates in a stable and reliable manner, allowing accurate counting of radiation events.
The energy resolution of a detector refers to its ability to distinguish between different energy levels of radiation. It is a measure of how well the detector can discriminate between two nearby energy levels.
Factors that affect energy resolution include electronic noise in the detector system, the intrinsic resolution of the detector material, the thickness of the detector material, and the electronic circuitry used to process the signals from the detector.
Pulse mode and current mode are two different methods of signal processing in radiation detectors. In pulse mode, the detector measures individual radiation events and generates discrete electrical pulses in response to each event.
These pulses are then counted or analyzed. In current mode, the detector measures the continuous current generated by the radiation, providing a continuous output signal.
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