A laboratory and observational search for the vibrational spectrum of C60

Physics – Optics

Scientific paper

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Laboratory

Scientific paper

We are conducting laboratory and observational searches for the 8.5 μm rovibrational band of C60. We have constructed a continuous-wave cavity ringdown spectrometer using a quantum cascade laser, and we have tested this spectrometer with the nu8 band of CH2Br2. The results of this study indicate that the C60 experiment should be feasible once laser mode hop diffculties are overcome. We are currently testing new optics that should soon eliminate these mode hops, allowing us to begin our search for the C60 spectrum. We have also begun an observational search for this C60 band toward four sources, though no obvious spectral features have been observed. We report here on our progress toward obtaining the first cold, resolved gas phase spectrum of C60 for comparison to observational spectra.

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