Abstract
Laser induced photodissociation of NaRb molecule has been observed when a mixture of Na and Rb metal vapour in a glass cell was irradiated by different lines of an argon ion laser. The photo reaction NaRb(X 1∑ +)+(Ar + laser photon)→ Na∗(3P)+Rb(5S) has been studied and relative cross section for various laser wavelenghts is measured. The variation of the relative photodissiciation cross section versus the laser wavelength shows a peak around 4727 Å. This quasi-resonance can be explained if we assume the photodissociation to take place in the continuum of D 1π state. Na∗(3P), a product of photodissociation emits both the D 1 (5896 Å) and D 2 (5890 Å) lines. It is argued that D 1π is strongly perturbed by the d 3π state and possibly by e 3∑ + state.
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