Proportional counter

{
  "id": "MLC-T-CHM-009552",
  "term": "Proportional counter",
  "field": "Chemistry",
  "definition": "A gas-filled radiation detector that gives an electrical pulse whose height scales with the energy deposited by the incoming radiation. It operates at a voltage high enough for the primary ions to trigger an avalanche of secondary ionization in the strong field near a thin anode wire, but low enough that the multiplication factor stays fixed. Geiger-Müller tubes, run at higher voltage, give pulses of the same size whatever the radiation energy.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "anode",
    "electric potential",
    "gas-filled X-ray detector",
    "ionization"
  ],
  "references": [
    "PAC, 1995, 67, 1745. 'Nomenclature, symbols, units and their usage in spectrochemical analysis-XI. Detection of radiation (IUPAC Recommendations 1995)' on page 1754 (https://doi.org/10.1351/pac199567101745)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/proportional-counter/"
}