?The R-branch of the \({ }^{1} \Pi_{\mathrm{u}} \leftarrow{ }^{1} \Sigma_{g}^{+}\)
Chapter 11, Problem E11F.9(a)(choose chapter or problem)
The R-branch of the \({ }^{1} \Pi_{\mathrm{u}} \leftarrow{ }^{1} \Sigma_{g}^{+}\) transition of \(\mathrm{H}_{2}\) shows a band head at the very low value of J = 1. The rotational constant of the ground state is 60.80 \(\mathrm{cm}^{-1}\). What is the rotational constant of the upper state? Has the bond length increased or decreased in the transition?
Text Transcription:
^1Pi_u^1Sigma_g^+
H_2
cm^-1
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