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 289.77 nm, 351.24 nm, 337.90 nm and scanning the second dissociation laser in the wavelength range of 557-759 nm. 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.