Abstract
Using an ab initio approach involving a non-empirical pseudopotentials for Na and Rb atoms, the adiabatic potential energy curves of 26 electronic states of NaRb
+ ionic molecule dissociating up to Na(4p)
+
Rb
+ and Na
+
+
Rb(7s) have been investigated. Their molecular spectroscopic constants have been derived and compared with the available theoretical works. Furthermore, the transition dipole moments from
X
2Σ
+ and 2
2Σ
+ to higher excited states have been determined. Numerous avoided crossings between electronic states of
2Σ
+ and
2Π symmetries have been localised and analysed. Their existences are related to the charge transfer process between the two ionic systems Na
+Rb and NaRb
+. The accurate potential energy curves have been exploited to realize a long-range vibrational level spacing analysis using the WKB semi-classical approximation in order to extract the Na and Rb atomic static dipole polarizabilities. A very good agreement between our static dipole polarizabilities and the available experimental and theoretical works has been observed.