لخّصلي

The amplitude of the output pulse signal is independent of the primary ionization, type and energy of the particles.The multiplication of ions by this process continues until there is a complete discharge along the whole length of the electrode, which gives rise to a sudden pulse of current in the external circuit.This current creates a potential difference across a large resistor R, which in turn reduces the potential of the central wire, thereby extinguishing the discharge

and getting the tube ready for the next event.Operating of the counter in this region eliminates the need for a highly regulated (stabilized) power supply, which is the biggest advantage of the Geiger counter.

The amplitude of the output pulse signal is independent of the primary ionization, type and energy of the particles. This property makes the Geiger counter well-suited for the detection of individual particles. An individual charged particle passing through the gas ionizes a gas molecule. The central wire attracts the electrons, while the cylindrical electrode attracts the positive ion. Because there is a very high electric field near the central wire, the approaching electrons gain high kinetic energy and cause further ionization of molecules. The multiplication of ions by this process continues until there is a complete discharge along the whole length of the electrode, which gives rise to a sudden pulse of current in the external circuit. This current creates a potential difference across a large resistor R, which in turn reduces the potential of the central wire, thereby extinguishing the discharge

and getting the tube ready for the next event.

The flat portion of the Geiger region is called a plateau. Operating of the counter in this region eliminates the need for a highly regulated (stabilized) power supply, which is the biggest advantage of the Geiger counter.

These detectors are commonly used to detect x-rays, low-energy gamma rays, and beta rays. That is why they are so widely used in prospecting for uranium, as well as in protecting personal in atomic power plants, and similar applications.