Spontaneous emission

{
  "id": "MLC-T-CHM-011242",
  "term": "Spontaneous emission",
  "field": "Chemistry",
  "definition": "The process by which an excited atom, molecule, or other quantum system decays to a lower energy state by emitting a photon without external perturbation. This emission occurs randomly in time and direction. The rate of spontaneous emission is characterized by the Einstein A coefficient.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "coefficient",
    "einstein",
    "emission",
    "mode",
    "stimulated emission"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2277 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/spontaneous-emission/"
}