Swan band

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File:Spectrum of blue flame.png
Spectrum of the blue flame from a butane torch showing excited molecular radical band emission and Swan bands.

Swan bands are a characteristic of the spectra of carbon stars, comets and of burning hydrocarbon fuels.[1][2] They are named for the Scottish physicist William Swan who first studied the spectral analysis of radical Diatomic carbon C2 in 1856.[3]

Swan bands consist of several sequences of vibrational bands scattered throughout the visible spectrum.[4]

See also

References

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