High Resolution Electron Ionization of N2O Clusters: Appearance Energies
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G. Hanel
Electron ionization cross sections for (N2O)n clusters have been investigated near the threshold with a newly constructed crossed beams apparatus using a hemispherical electron monochromator (HEM) to monochromatize the primary electron beam. Exploratory test measurements including electron attachment studies to CCl4 and CO and appearance energy (AE) determinations for some rare gases (Ar, Kr, Xe) and molecules (N2, O2, N2O, O2) measured for calibration purposes showed that the accuracy of the energy scale is better than 10 meV exhibiting a good linearity and that AE´s derived for these compounds agree within 20 meV with known photoionization data when using a novel data handling procedure (involving a simultaneous non-linear weighted least-squares fit of two functions).
Comparison of the presently derived appearance energies with earlier photoionization data shows a distinct difference in corresponding values attributed to different ionization mechanisms. Both data sets can be fitted successfully by a n-1/3 dependence yielding by extrapolation a value for the bulk photoelectric threshold (11.25 eV in the case of the photoionization data).
Articles in the same Issue
- Correlation of Adiabatic States between Perturbed Rotor and Renner-Teller Limits for a Closed-Shell Ion + Open Shell Diatom System
- Testing Intermolecular Potentials with Scattering Experiments: He-CO Rotationally Inelastic Collisions
- Collision-Induced Dissociation Dynamics of the [OCS · C2H2]+ Complex. A Combined Experimental and Theoretical Study
- Temperature Dependence of Collisional Energy Transfer in Highly Excited Aromatics Studied by Classical Trajectory Calculations
- Coupling Across Bonds: Ab Initio Calculations for the Anharmonic Vibrational Resonance Dynamics of the Coupled OH and CH Chromophores in Trans Formic Acid HCOOH
- A Saturated LIF Study on the High Pressure Limiting Rate Constant of the Reaction CN + NO + M → NCNO + M between 200 and 600 K
- High Resolution Electron Ionization of N2O Clusters: Appearance Energies
- Direct Measurements of the Reaction NH2 + H2 → NH3 + H at Temperatures from 1360 to 2130 K
Articles in the same Issue
- Correlation of Adiabatic States between Perturbed Rotor and Renner-Teller Limits for a Closed-Shell Ion + Open Shell Diatom System
- Testing Intermolecular Potentials with Scattering Experiments: He-CO Rotationally Inelastic Collisions
- Collision-Induced Dissociation Dynamics of the [OCS · C2H2]+ Complex. A Combined Experimental and Theoretical Study
- Temperature Dependence of Collisional Energy Transfer in Highly Excited Aromatics Studied by Classical Trajectory Calculations
- Coupling Across Bonds: Ab Initio Calculations for the Anharmonic Vibrational Resonance Dynamics of the Coupled OH and CH Chromophores in Trans Formic Acid HCOOH
- A Saturated LIF Study on the High Pressure Limiting Rate Constant of the Reaction CN + NO + M → NCNO + M between 200 and 600 K
- High Resolution Electron Ionization of N2O Clusters: Appearance Energies
- Direct Measurements of the Reaction NH2 + H2 → NH3 + H at Temperatures from 1360 to 2130 K
