Synchrotron radiation selected s-tetrazine ion chemistry

With use of synchrotron radiation (9-22 eV) the photon-selected chemistry of s-tetrazine ion is reported. Dissociation intermediates and products are investigated by the threshold photoelectron-photoion coincidence technique. On the basis of breakdown curves and thermodynamics, the loss of N_2 is found to be associated with the C_2N_2H_2^+ ion with an activation energy of 0.96 eV. Smaller fragment ions such as HCNH^+ and HCN^+ originate from single bond breaking of the C_2N_2H_2^+ primary fragment ion rather than the dissociation of the parent ion

Synchrotron radiation selected s-tetrazine ion chemistry

With use of synchrotron radiation (9-22 eV) the photon-selected chemistry of s-tetrazine ion is reported. Dissociation intermediates and products are investigated by the threshold photoelectron-photoion coincidence technique. On the basis of breakdown curves and thermodynamics, the loss of N_2 is found to be associated with the C_2N_2H_2^+ ion with an activation energy of 0.96 eV. Smaller fragment ions such as HCNH^+ and HCN^+ originate from single bond breaking of the C_2N_2H_2^+ primary fragment ion rather than the dissociation of the parent ion

Sections efficaces partielles de photoionisation mesurées et calculées pour CO entre 15 et 40 eV.

Vibrationally resolved partial photoionization cross sections of CO have been measured and theoretical partial cross sections have been calculated using the method of Raseev et al. and the two-step MQDT formulation of Giusti-Suzor and Lefebvre-Brion. We discuss the physical nature of the shape resonances appearing in the epsilon-sigma continua and we analyze their vibrational selectivity. A new assignment of the Rydberg series converging to CO+(B2Sigma+) is suggested and their electronic and vibrational selectivity is discussed