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photoionization

[ foh-toh-ahy-uh-nuh-zey-shuhn ]

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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Word History and Origins

Origin of photoionization1

First recorded in 1910–15; photo- + ionization ( def )

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photoinducedphotoisomerization