Geiger-Muller Counter Geiger-Muller Counter The Geiger counter may be a particle sight designed to detect radiation, like alpha and beta additionally as a gamma-ray (although with considerably lower sensitivity than other types of detectors). It was invented by the German physicist Geiger and later improved by his student Muller, therefore the name Geiger-Muller counter. It is probably one of the most famous radiation detectors, a clue to its simplicity. Principle Of Geiger-Muller Counter Because of the high positive voltage of the central wire, the electrons will be attracted to it while the positive ions will be attracted to the cathode wall. The high voltage will accelerate the positive and negative charges, they gain more energy and collide with more atoms to release more electrons and positive ions; the process escalates into a Gas Multiplication or Avalanche which produces an easily detectable pulse of current. Geiger-Muller Counter Construction A typical GM. tube essentially con