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

Isotopic and rotational structures of the ( υ ′, υ ″) = (13,5), (14,5), (16,5) and ( υ ′, υ ″) = (0,1)–(6,1) vibrational bands of the E 3 Σ + ← A 3 Π 0 + and E 3 Σ + ← B 3 Σ 1 + transitions in CdAr, respectively, as well as the ( υ ′, υ ″) = (21,9) of the E 3 Σ + ← A 3 Π 0 + transition in CdKr were investigated using free-jet expansion beam and laser excitation. An optical–optical double resonance process was employed from the X 1 Σ 0 + + to the E 3 Σ + Rydberg via the A 3 Π 0 + or B 3 Σ 1 + intermediate electronic state. The structure of the bands with resolved isotopic structure was analyzed including their rotational structure. Analysis and simulation of the bands provided values for vibrational and rotational characteristics of the states. The analysis extended our previous low-resolution studies performed for the E 3 Σ + ← A 3 Π 0 + and E 3 Σ + ← B 3 Σ 1 + transitions.