Photodissociation dynamics of gas-phase probed by optical emission spectroscopy

P. Heszler, J. Carlsson, P. Demirev

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Abstract

Fragmentation of gas-phase (Formula presented) after 193 nm laser excitation at 300 mJ/(Formula presented) fluence is probed by optical emission spectroscopy. Atomic C emission at 247.85 nm, and Mulliken, Deslandres-D’Azambuja, and Swan bands from (Formula presented) species are observed. Time-resolved experiments reveal prompt C and (Formula presented) fragmentation on a ns time scale or less, and delayed (Formula presented) release on a μs scale. The latter is a pathway for energy relaxation in (Formula presented), whereby delayed electronically excited (Formula presented) fragments are subsequently deexcited by photon emission.

Original languageEnglish
Pages (from-to)12541-12544
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume53
Issue number19
DOIs
Publication statusPublished - Jan 1 1996

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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