Abstract
The electron impact excitation of N2O was studied using the crossed electron-molecular beams method. Optical emission spectrum initiated by 50 eV electron impact was recorded within the range 200-700 nm. Main emission bands arise from excited ion state N2O+(A2Σ) and dissociative excitation into N2+(B2Σ+u). The rotationally un-resolved excitation-emission cross sections for selected ion transitions were scaled to absolute values and their dependence on electron energy was determined. Several of them were determined for the first time.
Highlights
Nitrous oxide has been the aim of studies for many years for wide variety of reasons
Optical emission spectrum initiated by 50 eV electron impact was recorded within the range 200-700 nm
The emission spectrum was measured at the incident electron energy of 50 eV in the spectral range from 200 nm to 700 nm
Summary
Nitrous oxide has been the aim of studies for many years for wide variety of reasons. The atmospheric chemistry is a field where spectroscopic data and cross sections are critical It is important in the field of astrophysics [3] as well as used in many technological applications such as N2O lasers [4, 5]. The excitation of nitrous oxide by electron impact leads to various products. Spectroscopic studies aimed at electron impact in gas phase were done in the past focusing on excitation cross sections [9, 10] and were mostly done in the visible spectral region. Michelin et al [13] theoretically evaluated the elastic and excitation cross sections for electron impact on nitrous oxide. Even though the emission of nitrous oxide has been studied well, the published absolute values of cross sections are often published only as a scattered values for selected energies. In this work we report whole curves: energy dependent cross sections for the emission cross section of the vibrationally resolved transitions of N2O+ (A2Σ - X2Π)
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