Near-threshold photoionization of hot isopropyl radicals

H. Fan, S. T. Pratt

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A combination of ion imaging and vacuum ultraviolet, single-photon ionization is used to study the internal energy dependence of the photoionization cross section of isopropyl radicals produced by the 266 nm photodissociation of isopropyl iodide. The isopropyl radicals so produced have internal energies of ∼0.3-2.0 eV. Images recorded for photoionization energies from just below the adiabatic ionization threshold at 7.37±0.02 and 8.04 eV are essentially identical both to each other and to that recorded at 9.67 eV. These results imply that the photoionization cross section is only weakly dependent on internal energy. Several factors contributing to this observation are discussed, as are the implications for the photoionization of other systems with significant internal excitation.

Original languageEnglish
Article number114312
JournalJournal of Chemical Physics
Issue number11
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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