The vacuum ultraviolet laser excitation spectra for free ion-pair (X+ plus Y-) formation from jet-cooled I-2 and ICl

KP Lawley, AC Flexen, RRJ Maier, A Manck, T Ridley*, RJ Donovan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The energy difference between the threshold for free ion-pair formation (X+ + Y-) and the molecular ionization energy (XY+) is relatively large in I-2 and ICl. Photodissociation to free ion-pairs in this energy region has been probed by vacuum ultraviolet laser radiation generated by four-wave mixing. The negative ion excitation spectra are highly structured and closely follow the one-photon absorption cross-sections. Several Rydberg series are identified, the f series being particularly prominent. Direct absorption to the free ion-pair continuum is negligible in this region and all of the Rydberg states that are accessed act as efficient doorway states to ion-pair production.

Original languageEnglish
Pages (from-to)1412-1418
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume4
Issue number8
DOIs
Publication statusPublished - 2002

Keywords

  • PHOTODISSOCIATION
  • IODINE

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