Evidence of the dominant production mechanism of ammonia in a hydrogen plasma with parts per million of nitrogen

Absolute ground state atomic hydrogen densities were measured, by the utilization of two-photon absorption laser induced fluorescence, in a low-pressure electron cyclotron resonance plasma as function nitrogen admixtures—0 to 5000 ppm. At admixtures 1500 ppm and higher, spectral distribution fluorescence changes from single Gaussian double distribution; this is due separate, nascent contribution arising photolysis an ammonia molecule. ppm, becomes dominant at all investigated pressures. Thermal loading experiments conducted heating chamber walls different temperatures; showed decrease contributions with increasing temperature. This explained considering how temperature influences recombination coefficients, which, it can be stated that Langmuir–Hinshelwood mechanism over Eley–Rideal mechanism.