With the aid of a labelled diagram, describe the action of an ionization chamber. 

With the aid of a labelled diagram, describe the action of an ionization chamber.

• A radiation source on the brass flat form causes ionization of air in the chamber producing electrons and positive ions.
• The electrons move to the metal can and positive ions drift to the central metal rod.
• Movement of the ions to the electrodes causes discharge and current pulse flows in external circuit.
• The current sensitive detector detects current.
• The magnitude of current detected shows the extent to which ionization takes place.

NB: ionizing chamber is ionizing particle detector.

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