Dissociative ionization accompanying emission by electron impact on N2O using fragment ion-photon coincidence (FIPCO) measurements

Fragment ion-photon coincidence (FIPCO) measurements by controlled electron impact on N2O have been carried out in order to investigate the dissociati ve ionization processes correlating with the emission in the 250-600 nm reg ion. The FIPCO spectra showed a band of the N-2(+) ion. Its band shape depe nded on a choice of the specific wavelength region used and varied accordin g to the wavelength region correlated. Its translational energy distributio ns have been estimated by Monte Carlo simulation. There are four dissociati ve ionization processes producing the N-2(+) ion. One of them was related t o the N-2(+)(B-X) emission, and the others were related to emission from hi ghly excited N2O+ ions. Their cross-sections were estimated as (3-60) x 10( -19) cm(2). (C) 1999 Published by Elsevier Science B.V. All rights reserved .