# Spectroscopic constants weye and weze

I am using Morse potential to calculate the spectroscopic constants of a diatomic molecule. So far I was able to calculate $$R_e$$, $$\omega_e$$, $$\omega_ex_e$$, $$B_e$$ but wasn't able to calculate $$\omega_ey_e$$ and $$\omega_ez_e$$. Does anyone have any idea how to calculate these two constants. I was searching in several textbooks for equations that I can use to calculate them using the Morse potential but I wasn't successful! Any help is really appreciated.

• The solution to the Morse potential only gives these constants, so does not actually describe a real potential in any more detail. Empirical series expansion of the energy terms gives ye, ze etc. You might want to look for the RKR method to define the potential. Aug 27 at 7:29
• Thank you so much @porphyrin
– Naps
Aug 28 at 15:20