Photoionization



[foh-toh-ahy-uh-nuh-zey-shuh n] /ˌfoʊ toʊˌaɪ ə nəˈzeɪ ʃən/

noun, Physics.
1.
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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