rotational spectrum
physics
Learn about this topic in these articles:
molecular spectroscopy
- In spectroscopy: Types of microwave spectrometer
For observation of its rotational spectrum, a molecule must possess a permanent electric dipole moment and have a vapour pressure such that it can be introduced into a sample cell at extremely low pressures (5–50 millitorr; one millitorr equals 1 × 10−3 millimetre of mercury or 1.93 × 10−5…
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Raman spectrum
- In spectroscopy: Raman spectroscopy
Analogously, there will be a rotational Raman spectrum for molecules with no permanent dipole moment that consequently have no pure rotational spectra.
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