MEDRADSC 2X03- Midterm Exam Guide - Comprehensive Notes for the exam ( 12 pages long!)
5 Oct 2017
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The fact that the human body cannot detect a lethal dose of ionising radiation has done much to raise apprehension in the public about this type of hazard. If the voltage in an ionisation system is increased beyond a certain point. An effect known as gas amplification occurs. The negative ions are now accelerated towards the anode: are of sufficient energy to cause further ionisation themselves before reaching the anode. If the voltage is increased further the gas amplification. Or avalanche effect is so great that a single ionising particle produces a large pulse of current. Can be converted by a simple rate meter to produce a click on a loudspeaker. The size of the pulse is the same regardless of the energy of the incident radiation: (d) the activation by neutrons, solid state detectors. Refers to certain classes of crystalline substances. Exhibit measurable effects when exposed to ionising radiation.
