an instrument for detecting and counting ionizing particles that pass through it: it consists of a needlelike electrode inside a hollow metallic cylinder filled with gas which, when ionized by the radiation, sets up a current in an electric field: a refined version (Geiger-Müller counter) with an amplifying system is used for detecting and measuring radioactivity
Origin of Geiger counterafter H. Geiger (1882-1945), German physicist
An instrument that detects and measures the intensity of radiation, such as particles from radioactive material, consisting of a Geiger tube and associated electronic equipment. Also called Geiger-M&udie;ller counter.
Origin of Geiger counterAfter Hans Wilhelm Geiger, (1882–1945), German physicist.
(plural Geiger counters)
- A device designed to detect radioactivity and measure its intensity.
Named after Hans Geiger who developed the first such device in 1908 together with Ernest Rutherford.