Photoionization cross section

{
  "id": "MLC-T-CHM-008883",
  "term": "Photoionization cross section",
  "field": "Chemistry",
  "definition": "A measure of the probability that an atom or molecule will absorb a photon and subsequently eject an electron. This value depends on the energy of the incident photon and the electronic structure of the species. It is typically expressed in units of area, such as square centimeters (cm^2) or megabarns (Mb).",
  "subject": "Analytical Chemistry",
  "see_also": [
    "sub-shell photoionization cross section"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1809 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photoionization-cross-section/"
}