Simultaneous pair transitions

{
  "id": "MLC-T-CHM-010881",
  "term": "Simultaneous pair transitions",
  "field": "Chemistry",
  "definition": "A process in which two or more atoms or molecules simultaneously absorb a single photon, leading to the excitation of both species. This phenomenon is a type of cooperative absorption, where the energy of the photon is shared between the interacting entities. It is observed in certain condensed phases and can lead to unusual spectroscopic features.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "chemical induction"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2273 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/simultaneous-pair-transitions/"
}