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VPL Molecular Spectra Search Engine

This Virtual Planetary Laboratory tool is a search engine that queries the molecular spectroscopic database HITRAN 2012 and displays plots of line intensity versus wavenumber for specific molecules within a user specified wavenumber range. For further details please see the documentation. For other related search engines please see the VPL Molecular Spectra Search Engine.

Choose a wavenumber range:

wavenumber range in cm^(-1) units ( between zero cm^(-1) and 50000 cm^(-1) )
wavenumber_low: cm^(-1)
wavenumber_high: cm^(-1)

Choose molecules:

Please press the findplots button only once.
It can take a few minutes to make the plots.

The plots are for the most abundant isotopologue.