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reproduces figure 2 from S. Churassy, G. Grenet, M. L. Gaillard and R.
Bacis, Opt. Comm. 30
41 (1979), and shows hyperfine structure in the 12-0 band of the B-X
electronic transition of I2. This shows how to handle
hyperfine structure for equivalent nuclei; each nucleus should show in
constants tree, but AsNext
is set true for the first nucleus it is treated as equivalent to the
second and all the constants are taken from the second nucleus. JAdjustSym is also off, as
it can give confusing results in this case.
The statistical weights are set to SymWt=1, AsymWt = 0, as there are no other equivalent nuclei in the molecule. Note that this is a change introduced in 7.1.141; previous versions required both SymWt and AsymWt non zero, but did not handle the case of more than one pair of equivalent nuclei correctly.