Why there is no absorption line of Ethylene in Hitran database near 1.63 um?

23 August 2017 1 6K Report

I read some paper they use the absorption line near 1.63um of Ethylene, but why I can't find this absorption line in the Hitran database?

Iouli E. Gordon

Dear Colleague, Spectroscopy of the ethylene miolecule is quite complicated and we do not have a very reliable reference line-by-line spectrum in the NIR yet. You can however try to use the PNNL database of cross-sections;

https://secure2.pnl.gov/nsd/nsd.nsf/Welcome

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