Title: sub-shell photoionization cross section
Long Title: IUPAC Gold Book - sub-shell photoionization cross section
DOI: 10.1351/goldbook.09357
Status: current

Definition
Cross section for an incident photon interacting with a material to produce one or more photoelectrons from a given sub-shell.

Note
Photoionization from one sub-shell can lead to shake-up or shakeoff of electrons from other shells.

Related Terms
- photoionization cross section: https://goldbook.iupac.org//terms/view/09267
- shake-up: https://goldbook.iupac.org//terms/view/09354
- shakeoff: https://goldbook.iupac.org//terms/view/09353

Source
- PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1830 (https://doi.org/10.1515/pac-2019-0404)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/09357/html
- json: https://goldbook.iupac.org/terms/view/09357/json
- xml: https://goldbook.iupac.org/terms/view/09357/xml

Citation: Citation: 'sub-shell photoionization cross section' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09357
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Accessed: 2026-04-20T13:32:11+00:00