Photoionization And Plasma Dissociation Of Hydrogen Sulfide

The level character of the high-excited electronic state-Rydberg serial of H2S moleculehave been researched with the means of resonance enhanced multiphoton ionizationspectrum,in which the outputs of a dye laser pumped by a pulsed Nd:YAG laser and OPOlaser are used as excitation sources.At the same time,the process of excitation anddissociation of H2S under streamer discharge in negative pulse have been researched by theway of fluorescence emission spectroscopy and time resolved spectroscopy.the consequenceis innovatively.The level characteristics of H2S molecular Rydberg series has been studied with themethod of Resonance enhanced multiphoton ionization spectroscopy(REMPI) in the range of484nm-620nm, in which the third harmonic output (355nm) of a nanosecond pulsed Nd: YAGlaser excited Dye laser and and OPO laser are used as excitation sources in the research ofH2S Rydberg series.the result is the regular series include two sets of spectral peak seriesnested that the Spectral peak interval appear twice changes with the increase of the spectralpeak interval.the intensive spectral serial are486.3,490.9,498.8,514.7,556.3nm;the weakspectral serial are488.5,494.7,505.5,531.9,602.2nm.the above spectral serial can be assignedas the excitation of H2S Rydberg series.According to the low-excited states and the height ofH2S Rydberg series,this ionization process has been confirmed the H2S from ground stateX1A1to middle resonance Rydberg state (four and one) five photons ionization. Now thestrong spectral peak series has been assigned to the H2S molecule in concentrating to H statenp（n=four,five,six,seven,eight）Rydberg series,also the weak spectral peak series has beenassigned to the H2S molecule in concentrating to D state ns（n=four,five,six,seven,eight）Rydberg series. The value of the assemble energy of the two Rydberg series are84572and84589,and the value of the quantum lost are0.92and1.52.result has important significancefor the Optical detection and spectroscopy characteristics of H2S molecule.In the research of the process of excitation and dissociation of H2S under streamerdischarge in negative pulse, the process of excitation and dissociation of H2S have been researched with the means of fluorescence emission spectroscopy and time resolvedspectroscopy.the outgrow revealed that there are many flexibility particle such asHS2、S2、S2-、H、SH，but H、SH generated at the same time.finally,determinate the two main excitationand dissociation passage asH Se2H2S2e,H2S e H2S e H SH.the result has importantsignificance for the research of the process of excitation and dissociation of H2S molecule.