Line width

{
  "id": "MLC-T-CHM-006610",
  "term": "Line width",
  "field": "Chemistry",
  "definition": "The range of frequencies, wavelengths, or wavenumbers over which an absorption or emission spectral line extends. It quantifies the spread of energy associated with a spectroscopic transition. This width is commonly measured at half the maximum intensity of the spectral peak, known as the full width at half maximum (FWHM).",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "frequency",
    "wavelength",
    "wavenumber",
    "lifetime",
    "nuclear transition"
  ],
  "references": [
    "Green Book, 2nd ed., p. 31 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)",
    "PAC, 1976, 45, 211. 'Nomenclature and Conventions for Reporting Mössbauer Spectroscopic Data' on page 213 (https://doi.org/10.1351/pac197645030211)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/line-width/"
}