The C(2)${}^1{\Pi }_u$ state in Rb${}_2$. Observation and deperturbation

Abstract

We report a systematic study of the C(2)${}^1{\Pi }_u$ electronic state in rubidium dimer, observed in polarization labelling spectroscopy experiment through the C $\leftarrow$ X${}^1{\Sigma }_g^{+}$ transitions recorded under rotational resolution in two isotopologues ${}^{85}$Rb${}_2$ and ${}^{85}$Rb${}^{87}$Rb. Regularity of the vibrational progressions was distorted by numerous interactions with the surrounding 2${}^1{\Sigma }_{\mathrm{u}}^{+}$, 2${}^3{\Pi }_{\mathrm{u}}$ and 3${}^3{\Sigma }_{\mathrm{u}}^{+}$ states. Deperturbation was performed by coupled-channels analysis taking into account spin-orbit and rotational interactions. Potential energy curves and parameters describing the off-diagonal matrix elements were determined as functions of internuclear distance. About 3000 line frequencies from the present study are reproduced with a standard deviation of 0.07 cm${}^{-1}$, in agreement with the experimental accuracy. Along with this, the model is consistent with all high resolution experimental data on the involved electronic states, available in the literature.

Supplementary data can be found at the http://dimer.ifpan.edu.pl

References in corpus (3)

• Interatomic potentials, electric properties, and spectroscopy of the ground and excited states of the Rb_2 molecule: Ab initio calculations and effect of a non-resonant field
• Photoassociation to the 2(1)Sigma(g)(+) state in ultracold 85Rb2 in the presence of a shape resonance
• The C(2)${}^1{\Pi }_u$ state in Rb${}_2$. Observation and deperturbation

Cited by in corpus (1)

• The C(2)${}^1{\Pi }_u$ state in Rb${}_2$. Observation and deperturbation