anti-Stokes Raman scattering

{
  "id": "MLC-T-CHM-000713",
  "term": "anti-Stokes Raman scattering",
  "field": "Chemistry",
  "definition": "A type of inelastic light scattering where the scattered photon gains energy from the molecule, resulting in a higher frequency than the incident photon. This occurs when the molecule is initially in an excited vibrational state and relaxes to a lower state during the scattering process. The intensity of anti-Stokes Raman scattering is generally weaker than Stokes Raman scattering because fewer molecules are in excited vibrational states at thermal equilibrium.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Raman scattering",
    "Stokes-Raman scattering",
    "electromagnetic radiation",
    "wavenumber in vacuum"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 738 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/anti-stokes-raman-scattering/"
}