OBSERVATION AND ANALYSIS OF THE SLIT JET/FTIR SPECTRA OF SOME SMALL DIMERS
Loading...
Date
2003
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
As a demonstration of our cw slit jet/FTIR spectrometer we have recorded and analyzed the jet $(T_{rot} = 10 K)$ spectra of $N_{2}O$ dimer, $N_{2}O$-Ar dimer, $CO_{2}$ dimer, and $CO_{2}$-Ar dimer in the $2100$ to $2400 cm^{-1}$ Region. A Bruker IFS 120HR FTIR spectrometer is used to interrogate the molecular and cluster species in a cw jet formed by the expansion of argon and $CO_{2}$ or $N_{2}O$ through a $12 cm \times 50 \mu$ m slit. Preliminary analysis of the $N_{2}O$ dimer spectrum gives the following constants: $A^{\prime\prime} = 0.299421(5) cm^{-1}, B^{\prime\prime} = 0.059928(1) cm^{-1}, C^{\prime\prime} =0.049841(1) cm^{-1}, \Delta^{\prime\prime}_{J} = 0.192(3) \times 10^{-6} cm^{-1}, \Delta^{\prime\prime}_{JK} = -0.93(3) \times 10^{-6} cm^{-1}, \Delta^{\prime\prime}_{K} = 0.71(1) \times 10^{-5} cm^{-1}, \delta^{\prime\prime}_{J} = 0.30(9) \times 10^{-7} cm^{-1}, \delta^{\prime\prime}_{K} = 0.7(2) \times 10^{-6} cm^{-1}$ and for the upper state $A^{\prime} = 0.299067(4) cm^{-1}, B^{\prime} = 0.059665(1) cm^{-1}, C^{\prime} = 0.049647(1) cm^{-1}, \Delta^{\prime}_{J} = 0.195(3) \times 10^{-6} cm^{-1}, \Delta^{\prime}_{JK} = -0.96(2) \times 10^{-6} cm^{-1}, \Delta^{\prime}_{K} = 0.712(8) \times 10^{-5} cm^{-1}, \delta^{\prime}_{J} = 0.33(9) \times 10^{-7} cm^{-1}, \delta^{\prime}_{K} = 0.9(1) \times 10^{-6} cm^{-1}$, and $\nu_{0} = 2229.48295(2) cm^{-1}$. Spectroscopic constants for the other dimers will also be presented.
Description
(PNNL is operated for the US Department of Energy by the Battelle Memorial Institute under contract DE-AC06-76RLO 1830).
Author Institution: Pacific Northwest National Laboratory
Author Institution: Pacific Northwest National Laboratory