Transition moment

{
  "id": "MLC-T-CHM-012234",
  "term": "Transition moment",
  "field": "Chemistry",
  "definition": "A vector quantity that describes the probability and polarization of an electronic transition between two quantum states in a molecule. It is calculated from the integral of the initial and final state wavefunctions and the electric dipole moment operator. The magnitude of the transition moment determines the intensity of an absorption or emission band, while its direction indicates the polarization of the light absorbed or emitted.",
  "synonyms": [
    "transition dipole moment",
    "electronic transition moment"
  ],
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "Franck-Condon principle",
    "angle",
    "electric dipole moment",
    "overlap integral",
    "polarization",
    "probability",
    "vibronic transition"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 434 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/transition-moment/"
}