Wavelengths,EnergyLevelClassi - PDF document

Wavelengths,EnergyLevelClassiÞcations,andEnergyLevelsfortheSpectrumofNeutralMercuryE.B.SalomanAtomicPhysicsDivision,NationalInstituteofStandardsandTechnology,Gaithersburg,Maryland20899Received22December2005;accepted22February2006;publishedonline11October2006AcomprehensivecriticallyevaluatedcompilationofthemostaccuratewavelengthmeasurementsforclassiÞedlinesofneutralmercuryforboththesingleisotopeHgandformercuryinitsnaturalisotopicabundancehasbeenprepared.Datafrom12sourcesspanningtheregionfrom1849to40050areincludedforHg.Datafrom39 inbothcentimeterandelectronvolts.Weusetheconver-sionfactor8065.54445±0.00069/eVasdeterminedbyMohrandTaylor.Thiscomprehensive,criticallyevaluatedcompilationtakesintoaccountpublishedworkthroughDecember2004.Thereareoccasionalexceptionswhenlaterworkisused.Theground-stateconÞgurationofneutralmercuryis.Theexcitedstateswecompileareoftheformand5,or,or.Wealsoincludelevelsofthe5Wetabulateonlythoselinesthathavewavelengthscon-sistentwithdifferencesinthetabulatedlevels.Onlyexperi-mentallyobservedlinesareincludedwithoneexceptionforthe1849lineof.DecisionsaremadeaboutwhichofseveralpossibleclassiÞcationsofagivenlinetoincludebycalculatingtherespectivetransitionprobabilitieswiththeCowanatomicstructurecodes.Asaresultofthisprocess,inafewcases,thelineclassiÞcationsmaydifferfromthosegiveninthestatedreferences.Severalphotoabsorptionpapersandlaser-spectroscopypapers,providedataaboutRydbergserieswithresultsuptoveryhighvaluesoftheprincipalquantumnumber.Inthiscompilationwelimitthetabulatedandthusalsothecorrespondinglinestoincludeonly20.WedonotincludeparityforbiddenlinesthatappearwhenelectricÞeldsmixtheparityoftheenergylevelsinlightsourcesorabsorbingatoms.SuchlinesarelikelytoexhibitlargeStarkshifts.Exceptforthe5ration,wealsohavenotincludedlinesandlevelsthatin-volvetwo-electronexcitationsfromthegroundstate.Ex-amplesoftheseareinareportbyMansÞeldofaseriesoflevels5=6Ð15andinareportbyCon-neradeandMansÞeldofexcitationsfromthe4and5Inthisworkweuseairwavelengthsforalllinesbetween2000and20000.Allotherwavelengthsarevacuumwave-lengths.Weclassifyall5and5levelsinRussell-SaundersorLScouplingandall5levelsinpairorjKcoupling.jKcouplingiswhereallbuttheÞnalelectronarecoupledtoformangularmomentumj.Thentheorbitalangularmomentum,,oftheÞnalelectroniscoupledtojtoformangularmomentumKandÞnallythiselectronÕs,iscoupledtoKtoformthetotalangularmomentumJ.ThetermisdenotedAlthoughtheyareoftendifÞculttoascertain,uncertaintiesinmostofthereferencedpublicationsofenergylevelsandlinesarelikelytobe1values.Inmanycasesonlythenumberofdecimalplacesindicatestheuncertaintyinthequotedvalues.WegenerallyuseaÒruleof20Ówherebyanuncertaintyofgreaterthan20intheleastsigniÞcantdigitservesasthecriterionfordroppingthatdigit.Thiscompilationdoesnotattempttoprovideacompletereviewofallworkonneutralmercury.Rather,itintendstocreditthemajorcontributions,especiallythosefromwhichvaluesareincludedinthelineandleveltables.2.PreliminaryEnergyLevelCompilationsApreliminarysetofenergylevelsisneededinordertoclassifytheobservedlinesandtoprovidetheinitialinputtotheenergyleveloptimizationprocedure.Levelswereob-tainedseparatelyforthenaturalisotopemixtureofmercuryandforthesingleisotope2.1.NaturalIsotopeMixtureofNeutralMercuryTheenergylevelsforamixtureofisotopesarethoseval-uesthatÞttheobservedwavelengthsobtainedfromthelinesproducedbylightsourcescontainingthatmixtureofiso-topes.Thepreliminaryvaluesof280energylevelsofthenaturalisotopemixtureofHghavebeencompiledfromtensources:Moore,GartonandConnerade,LearnerandDalbyandSanders,etal.DuncanandDevonshire,etal.etal.andZiaandBaig.Thesourceof142ofthelevelsweusecomesfromMoorewhoobtainedvaluesfromthecollectedex-perimentalworkupto1955.Inadditionweobtainedprelimi-narylevelsfromthefollowing:DuncanandDevonshirewhostudiedfourtwo-photontransitionsandobtainedim-provedvaluesforthe5and5els;LearnerandMorris,whoobservedemissionlinesandwereabletoclassifyÞvelevelsfromtheconÞgurations,and5;DalbyandSanders,usedfourphotonexcitationtodeÞnethe5elsfor=5Ð11;Baigetal.whoprovidedanimprovedvalueforthe5level;Ziaetal.whousedtwo-photontransitionstodetermine5snflevelsfor=10Ð20and5snp=19and20;ZiaandBaig,whousedtwo-stepexcitationtodetermine385snpelsfor=10Ð20;ChŽronetal.whoprovidedthevalueforthe5level;GartonandConnerade,whousedabsorptionspectroscopytoprovide51autoionizinglevels;andMansÞeld,whoexpandedthelastmentionedworktoprovide11moreautoionizinglevels.TherewasdisagreementbetweenvaluesreportedbyZiaandBaigandbyKasimovetal.abouttheenergylevelvaluesofthe5snpseries.WetriedtoÞttherespec-tivedatasetstotheRitzformulaandfoundthatonlythosetakenfromZiaandBaigÞtwell.Thereforeonlythatsetwasused.provideslevelsforthe5snf13whichwerebasedondatafromMurakawa.TheselevelsdonotÞttheRitzformulawell,andsotheselevelswerenotincludedinthepreliminarylist.ItwasnotedbyTomkinsandthattheselevelsinMooreareactuallyThepreliminaryvaluesof60energylevelsofcompiledfromÞvesources:BurnsandAdams,Herzberg,etal.andHumphreysandPaul.andAdamsandKaufmanusedphotographicFabry-Perotinterferometryandtheirresultseachprovided17energylev-elstothepreliminarylist.Herzberguseda6.4mgratingspectrographtomeasureanumberof1520E.B.SALOMANJ.Phys.Chem.Ref.Data,Vol.35,No.4,2006 fromwhichwecalculated15energylevelsusingthevaluesofKaufmanandBurnsandAdamslevelsasabasis.Pecketal.usedaMichelsontypeinterferometertomeasurewavelengthsfromwhichweobtainedanotherlevelusingoneoftheKaufmanlevelsasabasis.HumphreysandPaulusedagratingspectrometerintheinfraredanddeterminedeightlevelsandprovidedlinesfromwhichwecalculatedtwo3.WavelengthCompilationsLinesofthenaturalmixtureofHgwerereportedbymanysources. YearAuthorYearAuthor1891KayserandRunge1937MasakiandMorita1900Huff1937Sugaetal.1909Paschen1937WiedmannandSchmidt1909Paschen1938Murakawa1909Stiles1939Harrison1911Paschen1943Kamiyama1912Wiedman1950Burnsetal.1914Volk1953Humphreys1914Volk1954Fowles1915Cardaun1955GartonandRajaratnam1921Dingle1955Plyleretal.1922Walters1955Wilkinson1925Laffay1963WilkinsonandAndrew1925McLennanetal.1964Convertetal.1926Sawyer1965Junkesetal.1927DŽjardin1969GartonandConnerade1928Paschen1971LearnerandMorris1929McAlister1973ConneradeandMansÞeld1930TakamineandSuga1973MansÞeld1931Unger1983Baig1933Beutler1990Tursunovetal.1933Beutler1996Sansonettietal.1934Walerstein1997Baigetal.1935Murakawa1997Clevengeretal.1936Masakietal.1998Kasimovetal.1936Murakawa2004ZiaandBaigThelinesofHgwiththenaturalisotoperatiocompiledinthisworkweredrawnfrom39sourceswhicharesummarizedinTable1a.LinesofHgwerereportedbyseveralsources,assummarizedinthefollowing. YearAuthorYearAuthorYearAuthor1949PŽrardandTerrien1956Ranketal.1963Bairdetal.1950Blank1958BairdandSmith1963Schweitzer1950MeggersandWestfall1958Humphreysand1965Humphreysand1950MeggersandKessler1959Humphreysand1965Humphreysand1951Barrell1961Bargerand1974Kaufmanand1952BurnsandAdams1962Kaufman2004Salitetal.1956Herzberg1962Pecketal.2005Vezaetal.ATOMICSPECTRUMOFNEUTRALMERCURY1521J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2a.Spectrallinesofnatural-isotope-mixtureHgIClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ744.573134305.5S0Ñ510.02574744.810134262.45S0Ñ510.00969745.308134172.75S0Ñ510.00969745.834134078.15S0Ñ510.00969746.533133952.65S0Ñ510.00969746.543133951.5S0Ñ510.02574747.245133824.95S0Ñ510.00969747.315133812.45S0Ñ510.00969748.338133629.55S0Ñ510.00969748.520133597.05S0Ñ510.00969749.814133366.45S0Ñ510.00969749.960133340.5S0Ñ510.02574750.040133326.25S0Ñ510.00969751.788133016.25S0Ñ510.00969752.070132966.5S0Ñ510.02574752.272132930.65S0Ñ510.00969754.788132487.55S0Ñ510.00969755.368132386.5S0Ñ510.02574755.523132358.65S0Ñ510.00969759.537131659.25S0Ñ510.00969760.302131526.75S0Ñ510.00969760.724131453.75S0Ñ510.00969767.527130288.65S0Ñ510.00969768.951130047.35S0Ñ510.00969769.67129926.5S0Ñ510.0569782.64127773.5S0Ñ510.0569785.840127252.45S0Ñ510.00969787.57126973.10h5S0Ñ510.0725828.44120709.5S0Ñ510.0569833.66119953.20hs5S0Ñ510.0725838.422119271.75S0Ñ510.00969838.870119208.05S0Ñ510.00969839.371119136.85S0Ñ510.00969840.071119037.65S0Ñ510.00969 1b.SourcesofHgIlinesNumberofclassiÞcationsLightsourceWavelengthrange4235EDLwith267to400PaArcarriergas2302to69070.0002Ð0.0014923EDLwithKrcarriergas18494822to11177534EDLwith267PaArorKrcarriergas16921to171100.005554EDL12072to152960.0014Ð0.0021571Atomicbeamlightsource25370.00003592EDLwithArcarriergas10140and112870.0002and0.0004604EDLwithabout33PaArcarriergas4358to57910.00004Ð0.00006665EDL35227to400500.05Ð0.5671EDL392930.08751EDLwith33PaArcarriergas27530.0001971EDLwith33PaArcarriergas36500.0000510124EDLwith33PaArcarriergas2535to49160.00004Ð0.00014 EDLisanelectrodelessdischargelamp.133.3224Paisequalto1Torr.ATOMICSPECTRUMOFNEUTRALMERCURY1523J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2a.Spectrallinesofnatural-isotope-mixtureHgIÑContinuedClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ1301.00776863.545S0Ñ510.002911307.74976467.27S0Ñ510.002911402.7071291.1S0Ñ510.02241435.5369660.7S0Ñ510.02241728.57870523.721762.567545P23.721774.95634145P10.7171832.5754568.2P10.02681849.499454068.685S0Ñ510.0002631877.53277523.721885.53050533.721917.521655P23.721972.8750687.65P00.0285ClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ2001.9149936.12d5P2Ñ5P10.02182165.8046157.85D10.03262168.1246108.45D10.03262169.246085.15S10.522170.9846047.70hw5D10.02682173.0546003.85S10.03262174.4545974.20hw5D10.02682177.0845918.75S10.03262178.7645883.31hw5D10.02682182.0645813.95S10.03262184.2145768.81hw5D10.02682188.4645679.95S10.03262191.2545621.85D10.03262196.8645505.35S10.03262200.5845428.425D10.02682208.2645270.405S10.02682213.3845165.735D10.02682224.1944946.25S10.03262231.5744797.665D10.02682247.5744478.7S10.02682252.0544390.2D10.03262252.0544390.2D20.03262254.5944340.2D10.03262254.5944340.2D20.03262256.4644303.55S10.03262257.6344280.5D20.03262257.6344280.5D10.03262258.7144259.45D10.03262259.9344235.55S10.03262261.3644207.5D20.03262261.3644207.5D10.03262261.3644207.5D20.03262264.2144151.95S10.03262266.0244116.6D20.03262266.0244116.6D10.03262266.0244116.6D20.03262269.6144046.85S10.0326ATOMICSPECTRUMOFNEUTRALMERCURY1525J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2a.Spectrallinesofnatural-isotope-mixtureHgIÑContinuedClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ2536.52139412.235S0Ñ510.001902539.0739372.7D30.03262539.0739372.7D20.03262544.9439281.95S10.03262548.5339226.5D30.03262548.5339226.5D20.03262556.3539106.55S10.03262561.1539033.35D30.03262561.3339030.55D20.03262561.6139026.25D20.03262563.85538992.08S00.006382571.7638872.25S10.03262576.28538803.96S10.006382578.3938772.35D30.03262578.5938769.35D20.03262578.91238764.44D20.006382593.4138547.715S10.02182602.9738406.25D30.03262603.2038402.85D20.03262603.4238399.55D10.03262603.8238393.65D20.03262625.19238081.09S10.006382639.78037870.66D30.006382640.1537865.45D20.03262640.6537858.25D10.03262641.0837852.05D20.03262652.03937695.61D20.006382653.69037672.16D10.002632655.13437651.68D20.002632674.90837373.36S10.006382698.82837042.13D30.006382699.3637034.8D20.03262699.8137028.75D10.03262700.8037015.15D20.03262752.77736316.22S10.002632759.70536225.05S10.002632774.5836030.95P00.02852803.46635659.62D30.002632804.43435647.32D20.006382805.34435635.75D10.006382806.77335617.61D20.002632856.93534992.27S00.002632893.60134548.887S10.001902925.41434173.20S10.002632967.28333691.025D10.001903021.50433086.464D30.001903023.47133064.94D20.002633025.60633041.61D10.006383027.49033021.05D20.002633125.67431983.828D20.001903131.55531923.765D10.001903131.84431920.819D20.001903341.48429918.221S10.001903362.7129729.45D20.03263368.1529681.45D20.0326ATOMICSPECTRUMOFNEUTRALMERCURY1527J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2a.Spectrallinesofnatural-isotope-mixtureHgIÑContinuedClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ4686.38621332.43S1Ñ510.011984686.38621332.43S1Ñ500.011984699.79721271.565S1Ñ510.011984701.17121265.355S1Ñ520.011984703.01121257.035S1Ñ510.011984703.05121256.845S1Ñ500.011984719.74221181.675S1Ñ510.011984721.51221173.735S1Ñ520.011984723.81421163.415S1Ñ510.011984723.91921162.945S1Ñ500.011984745.14821068.275S1Ñ510.011984747.45821058.015S1Ñ520.011984750.39321045.005S1Ñ510.011984750.56021044.265S1Ñ500.011984778.11820922.895S1Ñ510.011984781.27420909.085S1Ñ520.011984785.15320892.135S1Ñ510.011984785.35420891.265S1Ñ500.011984822.20420731.615S1Ñ510.012984826.59420712.765S1Ñ520.012984831.87820690.115S1Ñ510.012984832.23820688.565S1Ñ500.012984882.99920473.50S1Ñ510.005454889.48920446.335S1Ñ520.012984896.91420415.325S1Ñ510.012984897.48220412.965S1Ñ500.012984916.06820335.78S00.010384960.120155.3100530.1724970.37020113.61S1Ñ510.005454980.64020072.14S1Ñ520.005454991.60120028.075S1Ñ510.012984992.59320024.095S1Ñ500.012985025.619892.635S10.275045.819812.92530.275102.70519591.989S1Ñ510.005455120.63719523.380S1Ñ520.005455137.94019457.632S1Ñ510.005455139.92619450.115S1Ñ500.013985218.919155.825S0Ñ510.275277.318943.81.55P20.5195290.74018895.690S0Ñ510.005455316.77618803.160S1Ñ510.005455354.03418672.31S1Ñ520.014985365.518632.412520.1725384.62618566.230S1Ñ510.005455388.81018551.8145S1Ñ500.005455393.46818535.7935S0Ñ510.005455404.818496.93520.1725460.75018307.415S10.001905549.63418014.203S0Ñ510.005455675.81117613.7S1Ñ510.0855769.61017327.389D20.001905789.69017267.29D10.05105790.67017264.372D20.001905803.78217225.368S0Ñ510.00545ATOMICSPECTRUMOFNEUTRALMERCURY1529J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2a.Spectrallinesofnatural-isotope-mixtureHgIÑContinuedClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ7602.1313150.675D20.3357605.9213144.045P20.3357646.3713074.535S10.3357674.0413027.455D30.3357677.3213021.835D20.3357728.82512935.018S0Ñ510.005457732.6012928.755S10.3357734.712925.205D10.5277820.7312783.085D20.3357822.5212780.115D10.5277826.0412774.345D20.3357899.112656.200D2Ñ510.6327899.112656.200P20.6327929.7812607.235S10.3357936.9012595.91D20.3357936.9012595.91D10.3357936.9012595.91D20.3357968.6312545.80D30.3357968.6312545.80D20.3357973.2712538.515S0Ñ510.3357979.0912529.375S10.3357998.6512498.705S00.3358007.1312485.41D30.3358007.1312485.41D20.3358022.2912461.865S10.3358031.8712447.00d5D2Ñ520.3358054.0812412.72D30.3358054.0812412.72D20.3358058.3712406.015D2Ñ520.3358070.7012387.0955D10.1298090.4012356.91dS10.3358090.4012356.91dS00.3358113.1112322.34D30.3358113.1112322.34D20.3358129.2512297.91dD2Ñ510.3358129.2512297.91dD2Ñ520.3358145.4012273.525S00.4318163.4312246.4105D20.3358166.4212241.985D10.3358172.7612232.495D20.3358173.7612230.955D20.5278177.2012225.80D2Ñ510.3358177.2012225.80D2Ñ520.3358189.1812207.93D30.3358189.1812207.93D20.3358189.1812207.93D2Ñ530.3358195.7212198.110D2Ñ510.3358195.7212198.110D30.3358197.412195.625D1Ñ520.6328200.5812190.985D20.3358205.2612184.0252-Ñ5D10.3358214.2012170.735S00.3358231.812144.7005D30.6328238.3512135.04D2Ñ520.3358238.3512135.04D2Ñ530.335ATOMICSPECTRUMOFNEUTRALMERCURY1531J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2a.Spectrallinesofnatural-isotope-mixtureHgIÑContinuedClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ9057.5711037.515D1Ñ500.4319067.5411025.321d5D3Ñ540.1299095.010992.0005D3Ñ520.4319157.8610916.615S10.5279200.7710865.715S00.5279243.2210815.8105D30.5279253.7010803.535D20.5279263.6710791.905D10.5279279.110774.005D20.5279298.610751.405S10.5279338.3810705.685D30.4319342.5310700.815D20.4299346.210696.605D10.4299354.710686.905D20.4299419.3810613.535D20.4319425.6410606.425S10.4299432.0610599.295D20.4319438.4610592.075D2Ñ530.4299442.7510587.295D1Ñ520.4319487.210537.605D1Ñ520.6329495.8610528.065D2Ñ530.4299526.2110494.575D3Ñ530.4319544.6610474.205D2Ñ510.4319547.310471.315D1Ñ510.4299554.110463.81.55D1Ñ500.4299574.2610441.835D3Ñ520.4319602.010411.61S1Ñ510.4319602.010411.61D2Ñ510.4319792.9010208.72S10.4319792.9010208.72D1Ñ510.4319792.9010208.72D2Ñ510.4319808.10193.15G42.309821.7510178.735S00.4319832.2810167.815S0Ñ510.4319838.0610161.80.55D10.5279969.3410028.00.55D20.5279980.9010016.405D10.5279999.09998.305D20.52710121.619877.105D30.52710129.579869.4005D20.52710139.759859.47S00.052610180.569820.005D2Ñ510.43110220.49781.74dS1Ñ500.83110220.49781.74dS1Ñ510.83110220.49781.74dD20.83110230.09772.51d5D2Ñ530.52710235.019767.755D1Ñ520.42910240.79762.30.55D20.52710296.29709.71d5D2Ñ530.52710320.89686.50.55D1Ñ521.3310332.349675.7105D3Ñ540.43110335.09673.215D3Ñ530.63210423.529591.125D3Ñ520.43110431.809583.425D2Ñ510.43110435.69580.005D1Ñ510.429ATOMICSPECTRUMOFNEUTRALMERCURY1533J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2a.Spectrallinesofnatural-isotope-mixtureHgIÑContinuedClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ17269.5789.D110.2317269.5789D310.2317329.415768.96D20.24417436.185733.64S0Ñ510.24417696.5649.5S1Ñ5210.2317980.5560.5S0Ñ5110.2318084.5528.D2Ñ5110.2318084.5528.S1Ñ5110.2318130.385514.10D3Ñ540.24418539.5392.60.65D3Ñ525.2019481.5132.5D1Ñ5110.2319571.5108.5D1Ñ5010.2319700.175074.71S10.24419705.945073.25D2Ñ515.8ClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ21086.4742.D3Ñ5210.2321086.4742.S010.2322499.424444.5595S10.054723259.424299.33S10.114732156.833109.765S00.214736312.932753.840D3Ñ540.074736312.932753.840S10.074739294.322544.905G40.654745134.342215.615D2Ñ510.554764918.1540.5S0100.64 2b.SpectralLinesofHgIClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ1849.491854068.9075000CS0Ñ510.000249ClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ2302.065143425.888D10.0002422345.440042622.869S10.0002422378.324642033.579D10.0002422380.004042003.921S10.0002422399.348541665.295D20.0002422399.729341658.684D10.0002422400.49741645.363D20.001422446.899840855.663S10.0002422464.063640571.097S10.0002422481.999340277.938D20.000242ATOMICSPECTRUMOFNEUTRALMERCURY1535J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 2b.SpectralLinesofHgIÑContinuedClassiÞcationUncertaintyofConÞgurationTermJConÞgurationTermJ5290.72918895.729S0Ñ510.002495316.76918803.184S1Ñ510.002495354.02918672.330S1Ñ520.001425384.61518566.567S1Ñ510.002495393.45418535.8415S0Ñ510.002495460.7529818307.40529S10.00004605549.63518014.200S0Ñ510.002495675.922517613.3938S1Ñ510.0002425769.5981817327.42411D20.00005605790.6626517264.39341D20.00006605803.77917225.377S0Ñ510.002495859.24517062.316S1Ñ510.002496072.712816462.5473S1Ñ510.0002426234.402016035.59475S0Ñ510.0002426716.428914884.7553S0Ñ510.0002426888.57614512.7845S1Ñ510.002496907.461214473.1063S1Ñ520.0002427081.90014116.612S1Ñ510.002497728.83112935.007S0Ñ510.002499425.91510606.1405S10.002499968.93610028.4115D20.005499998.3949998.8655D20.0054910139.79349859.43132S00.00025910240.3239762.6415D20.0054911176.7928944.6625S1Ñ510.0054911287.40688857.0056S1Ñ520.00045912071.60308281.63765S10.00215513570.57147366.8721S0Ñ510.00195513673.39647311.4727S1Ñ510.00145515295.97456535.8818S1Ñ520.00165516920.6645908.3197D2Ñ530.0055316942.4795900.7122D1Ñ520.0055317073.1255855.5592D3Ñ540.0055317109.8985842.9743D2Ñ530.00553ClassifcationUncertaintyofConÞgurationTermJÑConÞgurationTermJ35227.12838.722005G50.56639265.382546.7736005G30.056639292.562545.0115D30.086739300.822544.47615005G40.056639335.422542.23810005G40.056640050.422496.8537005G50.0566 Inanattempttoputtheintensitiesofthemoreprominentlinesonacommonscale,wetooktheworkofCross-whiteandDiekeasthebasisforintensitiesandadjustedthemoreextensivelistofintensitiesquotedinReaderetal.thesevalues.The121valuessoobtainedareprintedinanitalicfontinTable2a.ThisisalsodoneinTable2bforthoselinesdeterminedfortheseparatedisotope.Forthelineswhoseintensitieswerenotdeterminedbythismethod,wequotetheintensities,ifavailable,fromtheoriginalreference.Thosevaluesarenotonacommonscaleandareusefulonlyincomparinglinesfromthesamereference.SomereferencesuseÒ0ÓandÒ00Óasintensities.Ò0ÓisanintensitysomewhatlessthanÒ1Óbutnotzero.Ò00ÓisanintensitysomewhatlessthanÒ0.ÓItmustbenotedthattheintensityofalineisextremelysourcedependent.ItcandiffergreatlyindifferentlightATOMICSPECTRUMOFNEUTRALMERCURY1537J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 fortwo-photontransitionsofDuncanandDevonshireetal.andthefour-photondataofDalbyandSanders.WithmultiplyclassiÞedlineswedidnotincludetheclassi-ÞcationswhichwecalculatedtohavelowergfvaluesthanthedominantclassiÞcationexceptwhenthisprovidedtheonlyinformationaboutagivenlevelandtheprobabilityofthealternateclassiÞcationwasclosetothelargestone.TheprocessresultedinÞve5snflevelswhichwereincludedbyMoorenolongerbeingdeÞned.Theseunde-Þnedlevelswerethe5,and5.Theselev-elsarenotincludedinourlevellistsincetherearenotran-sitionstosupportthem.TheresultoftheoptimizationoftheenergylevelsforthenaturalisotopemixtureofHgisreportedinTable3a. 3a.Energylevelsofnatural-isotope-mixtureHgIEnergylevelConÞgurationTermJg0.0000.0070537644.9780.0071539412.2340.0041511.48609444042.9060.0031521.5010054068.6810.0031511.0145362350.3220.00305S12.0028563928.1170.0060568886.410.051570932.50.41531.086776945.270.061578676.990.141521.1170f78813.070.031511.210380127.40.31569516.5710.0121569661.800.021571207.2940.0091571294.850.081571333.0510.00405D21.0580371336.0020.00605D10.4986471396.0710.00405D21.1090871431.1770.00805D31.3343073961.1310.00705S12.0037574404.500.020576447.1090.0111576466.9350.0111511.4946f76823.430.071521.482576863.1350.0081577063.9680.00705D21.021977084.420.0305D10.499677107.8060.00705D21.146577129.3690.01105D31.3306f77236.850.081577239.060.041577241.500.061577286.850.071578216.120.0305S12.0088f78404.240.050579375.6490.0151579412.6130.0151579614.81.51579963.800.1415ATOMICSPECTRUMOFNEUTRALMERCURY1539J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 3a.Energylevelsofnatural-isotope-mixtureHgIÑContinuedEnergylevelConÞgurationTermJg82445.40.20582448.70.40582454.990.091582455.030.091582456.3710.0151582468.2.0582468.2.0582590.90.20582615.70.20582763.280.051582765.660.051582796.650.051582823.8120.0151582807.00.30582810.70.30582812.320.190582814.60.50582818.800.131582819.50.71582819.80.61582832.2.0582832.2.0582915.30.23582932.90.30583038.890.051583040.420.051583063.080.051583081.920.061583068.900.190583073.60.30583074.00.20583075.90.30583078.940.131583079.70.71583087.3.0583087.3.0583149.70.30583162.70.30583241.580.051583242.450.051583259.400.051583273.230.031583263.70.30583266.50.40583267.80.60583269.20.30583271.260.1215ATOMICSPECTRUMOFNEUTRALMERCURY1541J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 3a.Energylevelsofnatural-isotope-mixtureHgIÑContinuedEnergylevelConÞgurationTermJg83690.40.30583692.70.30583693.00.40583693.10.40583694.110.131583715.30.50583718.50.30583744.230.051583744.230.151583749.740.051583753.790.051583750.00.30583752.80.40583752.90.30583752.90.50583753.630.151583798.10.30583802.30.50583802.70.40583802.90.40583802.770.161583843.990.181583878.990.151584184.150.05ÑHgIILimitÑ88759.60.31593736.30.41590099.60.20593980.00.40596184.50.50597100.20.20597309.80.205105882.8.15112273.9.15115042.7.15116503.81.215117371.91.215117929.81.315118311.71.315118576.31.315118775.81.315118911.71.315119037.61.315119136.81.315119208.01.315119271.71.315112701.3.15112723.3.15ATOMICSPECTRUMOFNEUTRALMERCURY1543J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 3a.Energylevelsofnatural-isotope-mixtureHgIÑContinuedEnergylevelConÞgurationTermJg134305.5.15134746.1.ÑHgIILimitÑ Ò0ÓindicatesevenparityandÒ1Óindicatesoddparity.Theuncertaintyinthelastdigitsofthequotedvalueofgisgiveninparentheses.WherenouncertaintywasspeciÞedinthereference,weestimateanuncertaintyabout±0.005.Thereferencesforthevaluesofgareasfollows:a:KohlerandThaddeus;b:Huet;c:Huet;d:McDermottandLichten;e:HuetandChantepie;f:VanKleefandFred;andg:Blagoevetal.TheoptimizationoftheHglevelsshow,asexpected,thelargestdeviationsintheweightedÞttingoflinestakenwithlightsourceshavinghighercarrier-gaspressuresandAdamsandHerzberg.Thisisduetopressureshiftsofthemercurylinesbylight-sourcecarriergas.TheresultoftheoptimizationoftheenergylevelsforisreportedinTable3b. 3b.EnergylevelsofHgIEnergylevelConÞgurationTermJ0.00000.00050537645.24290.00041539412.45930.00031544043.13660.00021554068.90380.00021562350.54170.00020563928.33540.00040568886.42320.00081576945.110.041578813.09000.00071569662.0110.0041571207.54740.00041571295.20630.00161571333.29710.00020571336.26300.00040571396.32770.00030571431.41640.00040573961.37960.00040574404.67990.00050576467.1540.0041576823.64800.00051576863.3360.0061577064.18750.00050577084.72270.00120577108.01860.00050577129.64740.00060577236.97520.00181577239.30200.00171577241.61680.00181577286.97550.00171578216.33910.00100578404.44280.00120579412.8580.0061579963.93230.001915ATOMICSPECTRUMOFNEUTRALMERCURY1545J.Phys.Chem.Ref.Data,Vol.35,No.4,2006 umntwo.TheuncertaintiesgiveninTables3aand3brepre-senttheonestandarddeviationstatisticaluncertaintyofthelevelvalues.ThethirdcolumnspeciÞestheparityofthelevel:Ò0ÓforevenparityandÒ1Óforoddparity.ColumnsfourtosixspecifytheclassiÞcationofthelevelbygivingitsconÞguration,term,andJvalue.Table3ahasaÞnalcolumnwhichgivestheLandŽgvalueforthelevel.Theuncertaintyofthelastdigitsofthisvalueisgiveninparentheses.TheletterfollowingthisidentiÞesthesourceofthegquoted.Thesegvalueswerecompiledfromsevensources:McDermottandLichten,VanKleefandFred,KohlerandHuetandChantepie,andBla-etal.WealsoincludeTable3ctakenfromDingetal.givesforthenaturalisotopicmixturethesplittingsoftheand5toionizingenergylevelsfor=5Ð13.7.IonizationenergyTheÞrstionizationenergyofthenaturalisotopicmixtureofmercurywasdeterminedbyZiaetal.andZiaandBaigtobe84184.1510.437504bymeansofspectralanalysisofdifferentRydbergseries,whichtheyde-terminedusingoptogalvanicspectroscopy.Hormesetal.obtainedthe5and5limitsas119700and134746bymeansofspectralanalysisoftheRyd-bergseries,whichtheyobservedintheabsorptionofsyn-chrotronradiation.However,usingtheÞrstionizationenergyfromaboveandtheenergylevelsdeterminedforHgSansonettiandReaderweobtainforthe5119698.7714.840755andforthelimit134739.7216.7055958.AcknowledgmentsTheauthorwishestothankJ.ReaderandC.J.Sansonettiformanyhelpfuldiscussionsandadviceontheselectionofdatatoincludeinthiscompilation.ThisworkwassupportedinpartbytheOfÞceofFusionEnergySciencesoftheU.S.DepartmentofEnergyandbytheNationalAeronauticsandSpaceAdministration.9.ReferencesH.KayserandC.Runge,Ann.Phys.Chem.,385W.B.Huff,Astrophys.J.,103F.Paschen,Ann.Phys.,625F.Paschen,Ann.Phys.,746H.Stiles,Astrophys.J.,48F.Paschen,Ann.Phys.,8601911G.Wiedmann,Ann.Phys.,1041T.Volk,dissertation,TŸbinger,1914quotedbyRef.21.T.Volk,dissertation,TŸbinger,1914quotedbyRef.27.L.Cardaun,Z.Wiss.PhotographiePhotophys.Photochem.,56H.Dingle,Proc.R.Soc.London,Ser.A,167F.M.Walters,Jr.,Bur.Stand.,Sci.Pap.,161T.TakamineandM.Fukuda,Jpn.J.Phys.,111M.Fukuda,Jpn.J.Phys.,139J.Laffay,Acad.Sci.,Paris,C.R.,823J.C.McLennan,H.G.Smith,andC.S.Peters,Trans.R.Soc.Canada,39R.A.Sawyer,J.Opt.Soc.Am.andRev.Sci.Instrum.,431G.DŽjardin,Ann.Phys.,424F.Paschen,Sitzungsber.Preuss.Akad.Wiss.,Phys.Math.Kl.,536E.D.McAlister,Phys.Rev.,1142F.Paschen,Ann.Phys.,47T.TakamineandT.Suga,Sci.Pap.Inst.Phys.Chem.Res.H.J.Unger,Phys.Rev.,844H.Beutler,Z.Phys.,289H.Beutler,Z.Phys.,710I.Walerstein,Phys.Rev.,874K.Murakawa,Proc.Phys.Math.Soc.Jpn.,14O.Masaki,K.Kobayakawa,andT.Morita,J.Sci.HiroshimaUniv.,Ser.,291K.Murakawa,Proc.Phys.Math.Soc.Jpn.,345;erratumO.MasakiandT.Morita,J.Sci.HiroshimaUniv.,Ser.A,305T.Suga,M.Kamiyama,andT.Sugiura,Sci.Pap.Inst.Phys.Chem.Res.,32G.WiedmannandW.Schmidt,Z.Phys.,273K.Murakawa,Z.Phys.,168G.R.Harrison,MassachusettsInstituteofTechnologyWavelengthTableswithIntensitiesinArc,Spark,orDischargeTubeofMorethan100,000SpectrumLines,MostStronglyEmittedbytheAtomicElementsunderNormalConditionsofExcitationBetween10,000.and2000.Ar-rangedinOrderofDecreasingWavelengthstheTechnologyPress,Mas-sachusettsInstituteofTechnology,Wiley,NewYork,1939M.Kamiyama,Bull.Inst.Phys.Chem.Res.,877A.PŽrardandJ.Terrien,Acad.Sci.,Paris,C.R.,964J.M.Blank,J.Opt.Soc.Am.,345K.Burns,K.B.Adams,andJ.Longwell,J.Opt.Soc.Am.,339W.F.MeggersandF.O.Westfall,J.Res.Natl.Bur.Stand.,447W.F.MeggersandK.G.Kessler,J.Opt.Soc.Am.,737H.Barrell,Proc.R.Soc.London,Ser.A,132K.BurnsandK.B.Adams,J.Opt.Soc.Am.,56K.BurnsandK.B.Adams,J.Opt.Soc.Am.,716C.J.Humphreys,J.Opt.Soc.Am.,1027G.R.Fowles,J.Opt.Soc.Am.,760W.R.S.GartonandA.Rajaratnam,Proc.Phys.Soc.London,1107E.K.Plyler,L.R.Blaine,andE.D.Tidwell,J.Res.Natl.Bur.Stand.P.G.Wilkinson,J.Opt.Soc.Am.,862G.Herzberg,Proc.R.Soc.London,Ser.A,516D.H.Rank,J.M.Bennett,andH.E.Bennett,J.Opt.Soc.Am.,477H.M.CrosswhiteandG.H.Dieke,ImportantAtomicSpectra,inAmeri-canInstituteofPhysicsHandbook,D.E.GreyMcGraw-Hill,NewYork, 3c.Observedsplittingofthe5energylevelsDing522.2±1.0611.4±0.476.6±0.284.45±0.2093.04±0.18102.17±0.14111.59±0.12121.19±0.11130.91±0.14 ATOMICSPECTRUMOFNEUTRALMERCURY1547J.Phys.Chem.Ref.Data,Vol.35,No.4,2006