Article | REF: P2656 V1

Theory of molecular spectra

Author: Alain PETIT

Publication date: March 10, 2002, Review date: January 5, 2017

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8. More about diatomic molecules

8.1 Missing rotational lines and alternating intensities

Homonuclear molecules with a nuclear spin equal to 0 have alternating missing rotational lines in each band. If the nuclear spin is not equal to zero, the rotational line intensities alternate between weak and strong.

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