j-value

{
  "id": "MLC-T-CHM-006294",
  "term": "j-value",
  "field": "Chemistry",
  "definition": "The photolysis rate constant for a chemical species in the atmosphere, representing the frequency at which a molecule absorbs a photon and undergoes a photochemical reaction. It depends on the absorption cross-section of the molecule and the actinic flux of solar radiation at a given wavelength. The j-value is expressed in units of reciprocal seconds (s⁻¹).",
  "subject": "Chemistry and the Environment",
  "see_also": [
    "photochemical reaction",
    "order of reaction"
  ],
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2198 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/j-value/"
}