Study on the [1+1′] photodissociation spectra of CO2+ via C2Σg+←B2Σu+/A2Πu,1/2←X2Πg,1/2 transitions

We have obtained the mass-resolved [1+1′] two-photon dissociation spectra of CO2+ via the C2Σg+(υ1,υ2,0)←B2Σu+(000)/A2Πu,1/2(000;100)←X∼2Πg,1/2(000) transitions by fixing the first dissociation laser at 289.77nm, 351.24nm, 337.90nm and scanning the second dissociation laser in the wavelength range of 557–759nm. The original position and the spectroscopic constants for CO2+(C2Σg+) are deduced and the dependence of the product branching ratios [CO+]/[O+] of CO2+(C2Σg+) on the vibration levels has been observed.