| Popis: |
Experiments are reported in which radiative emissions from 8 keV N2·+ projectile ion—target gas (He, N2, O2 and CO2) collisions in the third field-free region of a modified VG ZAB-2F mass spectrometer (BEE geometry) were detected and analyzed using a scanning grating monochromator. The emission spectra between 180 and 680 nm were characterized by the N2·+ (B2Σu+ → X2Σg+) electronic transition and, when N2 and O2 were the targets, the C 3Πu → B 3Πg second positive system in N2. Fragment N+ emissions were also observed. In addition to the projectile emissions, ionized target gas and even target fragment emissions were present with all targets except helium. Observations made 0.05–0.17 μs after the collision event were similar to those described above, but lacking target gas emissions. Qualitative information concerning the trends in post-collission emission, studied with 18 target gases, was obtained using wavelength cut-off filters. The results were consistent with the above spectral assignments and trends observed in collision induced dissociation mass spectrometry. |
