Geiger counter

https://doi.org/10.1351/goldbook.G02598
A
gas-filled X-ray detector
in which gas amplification reaches
saturation
and proportionality no longer exists. The output signal does not depend on the incident energy. The time taken for the counter to recover from the
saturation
is called
dead time
.
Source:
PAC, 1995, 67, 1745. (Nomenclature, symbols, units and their usage in spectrochemical analysis-XI. Detection of radiation (IUPAC Recommendations 1995)) on page 1754 [Terms] [Paper]