Isotope measurements in molecules

[BillKet]

Hello! Is there any measurement (can be from different papers/experiments) of a diatomic molecular isotopic chain (i.e. at least 3 isotopes of a given nucleus) where the ground state is $^{2}\Sigma$?

 

[DrDu]

I suppose you can find data on HeH+, HeD+ and HeT+.
There are accurate calculations:
https://aip.scitation.org/doi/10.1063/1.4759077
These molecules are of great interest, as they form in the decay of TH, TD and T_2 which are intensively studied in the context of measuring the mass of neutrinos.

 

[BillKet]

I suppose you can find data on HeH+, HeD+ and HeT+.
There are accurate calculations:
https://aip.scitation.org/doi/10.1063/1.4759077
These molecules are of great interest, as they form in the decay of TH, TD and T_2 which are intensively studied in the context of measuring the mass of neutrinos.

Thank you! But these seems to be calculated not measured? Also they don't list the molecular parameters associated to that energy level, which is what I actually need.

 

[mjc123]

They would be singlets, wouldn't they? You want something like H₂⁺.

 

[BillKet]

They would be singlets, wouldn't they? You want something like H₂⁺.

That's also true (honestly I would prefer something bigger than hydrogen, tho)