Diode laser detection of iodine atom hyperfine transitions during and after infrared multiphoton excitation and dissociation of CF3I with short pulse CO2 lasers

Yabai He*, Martin Quack, Roland Ranz, Georg Seyfang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The iodine atom concentration has been measured by time-resolve absorption spectroscopy for all hyperfine levels on the I(2P 3 2)→I(2P 1 2)) transition during and after the multiphoton excitation of CF3I, using a tunable diode laser in the near infrared at 1.3 μm. The experiments have been performed under collision free conditions with a time resolution of about 1 ns. Using CO2 laser pulses of different temporal shape, the nonlinear intensity dependence of the multiphoton excitation process and the previously measured steady state rate constants have been confirmed. Detection at different hyperfine transistion frequencies and charging the relative orientation of the polarization of the pump and probe laser showed statistical behaviour for the population of the hyperfine levels and for the orientation of the iodine atoms. Using CO2 laser pulses of specially tailored temporal shape the theoretically predicted intensity fall-off for the steady state rate constant has been found experimentally.

Original languageEnglish
Pages (from-to)228-236
Number of pages9
JournalChemical Physics Letters
Volume215
Issue number1-3
DOIs
Publication statusPublished - 26 Nov 1993
Externally publishedYes

Fingerprint

Dive into the research topics of 'Diode laser detection of iodine atom hyperfine transitions during and after infrared multiphoton excitation and dissociation of CF<sub>3</sub>I with short pulse CO<sub>2</sub> lasers'. Together they form a unique fingerprint.

Cite this