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photoionization

[ foh-toh-ahy-uh-nuh-zey-shuhn ]
/ ˌfoʊ toʊˌaɪ ə nəˈzeɪ ʃən /
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noun Physics.

the phenomenon in which the absorption of electromagnetic radiation by an atom in a gas induces the atom to emit a bound electron and thereby become ionized.

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Origin of photoionization

First recorded in 1910–15; photo- + ionization
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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