The rotational Raman spectrum of ${}^{19}\mathrm{F_2}$ shows a series of Stokes lines at $19230.769\ \mathrm{cm^{-1}}$, $19227.238\ \mathrm{cm^{-1}}$ and $19223.707\ \mathrm{cm^{-1}}$. The rotational constant for ${}^{19}\mathrm{F_2}$ in GHz is:
(a)26.484
(b)52.968
(c)105.936
(d)3.531
Answer
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