Intended crossing

{
  "id": "MLC-T-CHM-005920",
  "term": "Intended crossing",
  "field": "Chemistry",
  "definition": "A point on a potential energy surface where two electronic states would intersect if their interaction were neglected. This concept is relevant in understanding non-adiabatic processes where the Born-Oppenheimer approximation breaks down. In reality, such crossings are often avoided due to coupling between the electronic states.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "avoided crossing"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2248 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/intended-crossing/"
}