ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We report experiments studying the fluorescence and two-photon excitation spectroscopy of xenon dimers and small clusters formed in supersonic jets. Under thermodynamic conditions for maximum dimer density, determined by two-photon resonant multiphoton ionized time-of-flight (TOF) spectroscopy, no fluorescence of free bound excimers correlating to Xe* 6p[1/2]0, 6p[3/2]2, or 6p[5/2]2 was observed; very weak excimer fluorescence was observed for the excimer correlated with Xe+Xe* 5d[1/2]1. Comparing the observed atomic fluorescence and measurements of the monomer–dimer ratio, we estimate predissociation lifetimes on the order of 10−3 of the expected radiative lifetime. TOF spectra are consistent with predissociation for all excimers except those correlating to 6p[5/2]2. At higher nozzle stagnation pressures, we observed fluorescence from vibrationally or electronically relaxed Xe2* excimers imbedded in helium clusters Hn, with 〈n〉 most probably 6 and 13. We report dispersed spectra, and using modeled reflection spectra, we assign the fluorescence spectra to 6p[1/2]00g+→6s[3/2]1B0u+, 6p[1/2]00g+→6s[3/2]11u, and 5d[1/2]10g+→6s[3/2]2A1u. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.474276
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