Structure of vibrational bands of the E3Σ+(63S1)←A3Π0+ (53P1), B3Σ1+ (53P1) transitions in CdAr and CdKr studied by optical-optical double resonance method

► Optical-optical double resonance excitation of Rydberg molecular states. ► Interatomic potentials of Rydberg electronic states of CdAr and CdKr complexes. ► Isotopic structure of vibrational band resolved. ► Vibrational and rotational characteristics determined. ► Interatomic potentials of the A3Π0+, B3Σ1+andE3Σ+ electronic states constructed.