Research Article
Inefficient Vibrational Cooling of C60 in a Supersonic Expansion
Table 3
Estimated number of two body hard sphere collisions experienced by large molecules seeded in an argon supersonic expansion. The first three entries in the table are from the attempted C60 spectroscopy reported in this work. The pyrene entry is from our previous work observing pyrene in the same experimental setup which we used to attempt C60 spectroscopy [13]. The remaining entries are from laser induced fluorescence spectroscopy of the listed PAHs performed by Amirav et al. [14]. The listed pressures for the PAHs were sufficient to produce vibrationally cold molecules ( K). The C60 and pyrene expansions used a 12.7 mm × 150 μm slit. For the work of Amirav et al. [14] all expansions used a 150 m diameter pinhole. Further details on how the number of collisions was calculated can be found in the article text.
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