简介：Netemissioncoefficientsofradiationwerecalculatedforisothermalplasmaofmethaneasafunctionoftheplasmatemperature5,000～30,000Kandthearcradius0mmto10mmatatmosphericpressure.Calculationstakeintoaccountcontinuumandlineradiations,specialattentionhasalsobeengiventotheinfluenceofoverlappingspectrallines.ThelineshapesinourcalculationsaregivenbyconvolutionofDopplerandLorentzprofiles,resultinginasimplifiedVoigtprofile.Inthecaseofahydrogenprofile,weusedtheVidaltables,andthefourfirstLymanlinesandthefourfirstBalmerlineswereconsidered.Thiscalculationwascarriedoutontheassumptionoflocalthermodynamicequilibriumandinanondiffusiveenvironment.ThenetemissioncoefficientcalculationforpureargonplasmawascomparedwiththeexperimentalresultsofEvansinourpreviouswork.Weusedtheescapefactor,andourresultswerehigherthanthoseoftheexperiment.Inthispaper,weexplainwhy,usingtheescapefactor,theradiationisoverestimated.ThenetemissioncoefficientobtainedfromarealspectrumwascomparedwithEssoltaniwork’swhichusedtheline-by-linemethodforpureargonplasma.

简介：Amethodbasedupontheweightedtotalcrosssection(WTCS)theoryisproposedtocalculatethephoto-ionisationcrosssectionsandtheradiativerecombinationratecoefficientsbetweenthefundamentallevelofCOandthemainelectronicstatesofitscorrespondingion.Totalphoto-ionisationcrosssectionsandradiativerecombinationratecoefficientsaredeterminedfromthecalculationofelementaryvibrationalphoto-ionisationcrosssections.TransitionsbetweenCO~+(X,AandB)andCO(X)areconsidered.Totalphoto-ionisationcrosssectionsandrecombinationcoefficientsarecomputedinthetemperatureinterval500-15000K.