Photoionization

{
  "id": "MLC-T-CHM-008882",
  "term": "Photoionization",
  "field": "Chemistry",
  "definition": "The process by which an atom or molecule loses an electron upon absorbing a photon with energy greater than its ionization energy. This leads to the formation of an ion and a free electron. It is a fundamental process in mass spectrometry, photoelectron spectroscopy, and atmospheric chemistry.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "ionization",
    "mass spectrometry"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 203 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1548 (https://doi.org/10.1351/pac199163101541)",
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2261 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photoionization/"
}