Reassigning the CaH$^+$ 1$^{1}Σ\rightarrow$ 2$^{1}Σ$ vibronic transition with CaD$^+$
We observe vibronic transitions in CaD$^+$ between the 1$^{1}Σ$ and 2$^{1}Σ$ electronic states by resonance enhanced multiphoton photodissociation spectroscopy in a Coulomb crystal. The vibronic transitions are compared with previous measurements on CaH$^+$. The result is a revised assignment of the CaH$^+$ vibronic levels and a disagreement with CASPT2 theoretical calculations by approximately 700 cm$^{-1}$.
physics.atom-ph↗