Photoionization of hot radicals

C 2H 5,n-C 3H 7, and i-C 3H 7

Haiyan Fan, S. T. Pratt

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The combination of ion-imaging and vacuum-ultraviolet (vuv) single-photon ionization is used to study the internal energy dependence of the relative photoionization yields of the C2 H5, n- C3 H7, and i- C3 H7 radicals following the 266 nm photodissociation of the corresponding alkyl iodides. The comparison of the ion images obtained by vuv photoionization of the radical with those obtained by two-photon-resonant, three-photon ionization of the complementary I P 32 2 and I* P 12 2 atoms allows the extraction of the internal energy dependence of the cross sections. Factors influencing the appearance of the ion images in the different detection channels are discussed, including the secondary fragmentation of the neutral radicals, Franck-Condon factors for the photoionization process, and the unimolecular fragmentation of the parent photoions.

Original languageEnglish
Article number204301
JournalJournal of Chemical Physics
Volume123
Issue number20
DOIs
Publication statusPublished - 2005
Externally publishedYes

Fingerprint

Photoionization
photoionization
Photons
Ions
internal energy
Ionization
fragmentation
photons
Vacuum
Photodissociation
ionization
vacuum
ions
Iodides
photodissociation
iodides
Imaging techniques
Atoms
cross sections
atoms

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Photoionization of hot radicals : C 2H 5,n-C 3H 7, and i-C 3H 7. / Fan, Haiyan; Pratt, S. T.

In: Journal of Chemical Physics, Vol. 123, No. 20, 204301, 2005.

Research output: Contribution to journalArticle

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