			15min:

THE NEAR-IR HIGH RESOLUTION SPECTRUM OF JET-COOLED ETHYL PEROXY RADICALS.

PATRICK DUPRÉ, PATRICK RUPPER AND TERRY A. MILLER, Department of Chemistry, The Ohio State University, 120 W 18^ th Ave, Columbus OH, 43210.

The jet-cooled high resolution CRDS spectra of the ethyl peroxy radicals, C₂ H₅ OO and C₂ D₅ OO have been recently obtained for the A ²A^' leftarrow X ²A^'' 0₀⁰ band. The observation of this weak transition: signal of a few ppm/pass for the most populated G conformer has been possible by using a narrow linewidth (Fourier-transform-limited) laser source and a hydrogen Raman shifter (resolution: 250-300 MHz). The radicals are produced by creating a plasma (by using a DC or a RF discharge) inside a pulsed slit nozzle . We will discuss the analysis of these complex spectra.