photoionizationn.
/ˌfəʊtəʊˌʌɪənʌɪˈzeɪʃn/, U.S. /ˈˌfoʊdoʊˌaɪənəˈzeɪʃ(ə)n/, /ˈˌfoʊdoʊˌaɪənˌaɪˈzeɪʃ(ə)n/ Physics and Astronomy.
Ionization caused by electromagnetic radiation.
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photoionization1914
1914 S. E. Sheppard Photo-chem. ix. 356 (heading) Photo-ionization of gases.
1928 Proc. Royal Soc. A. 117 503 These photoionisation results may be explained equally well if the ionisation is due to any of the transitions K2 → K+ + K− [etc.].
1975 D. H. Burrin in B. L. Williams & K. Wilson Biologist's Guide to Princ. & Techniques Pract. Biochem. v. 166 Strong electric fields..or ultraviolet light (photoionization) may be employed to ionize the sample.
2002 M. T. Sullivan Labyrinth 277 Look at the scans... We're fluctuating between seven and nine megavolts. Low photoionization, relatively weak neutron and gamma-ray production.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.1914