In electronic spectroscopy, constructing a "'Deslandres table "'is a useful method to assign vibronic transitions.
2.
When a Deslandres table is filled correctly, the columns represent the vibrational energy levels of the lower electronic state ( " v " " ), while the rows represent those for the upper electronic state ( " v "').
3.
Thus, by completing a Deslandres table it is easy to assign the correct vibrational quantum numbers " v " " and " v "'for the transition, allowing important molecular properties to be calculated, such as the dissociation energy.
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