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Because of the voltage difference across the electrodes in a gas-filled detector circuit, what do the positive ions do?

Answer :

In gas-filled detector circuits, positive ions generated from ionizing radiation are attracted towards the negatively charged electrode, where they are neutralized, leading to a current flow that can be measured and used to detect and quantify the radiation.

In a gas-filled detector circuit, such as those used in gaseous ionization detectors, the positive ions are a critical part of the detection process. When ionizing radiation enters the detector, it ionizes the gas present, which results in the creation of electrons and positive ions. These positive ions then move towards the electrodes due to the voltage difference across them.

Specifically, the positive ions are attracted to the negatively charged electrode (cathode), where they become neutralized when an electron from the metal electrode combines with the ion. This process reduces the positive ion to a neutral atom or molecule and causes a displacement of electrons within the metal, creating an electric current in the circuit. This current is then amplified and recorded, which corresponds to the detection of the particle that caused the ionization. The number of ions and the resulting current flow can inform us about the intensity and type of radiation detected.

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