Pressure broadening

{
  "id": "MLC-T-CHM-009409",
  "term": "Pressure broadening",
  "field": "Chemistry",
  "definition": "The widening of spectral lines in absorption or emission spectroscopy due to collisions between the radiating atoms or molecules and other particles in the gas phase. These collisions perturb the energy levels of the species, leading to a distribution of transition frequencies. The extent of broadening increases with higher gas pressure.",
  "synonyms": [
    "collision broadening"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "spectral line",
    "wavelength in vacuum"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 760 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/pressure-broadening/"
}