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1、AnalysisoftheemanometerYuanzicheng(ChengduUniversityofTechnology,ChengduErxianqiao610059)AbstractThearticleAnalysistheemanometerinstudyingfield.Usedinundergroundengineering,mining,tourismcave,nuclearfacilities,theassociateduraniumandradonmeasurementofindoorenvironment,healthsupervisionandevaluationo
2、fradioactivedetection,isasearchforradon,radonsource(th)devicemanagement,radiationsafetyevaluationandothernecessary.Keywordsemanometer;Radon;decay;admeasuringapparatus1.IntroductionRadonoverviewRadonisanaturalradioactivedecayofradiumisotopesinsuburaniumandthoriumdecayseriesinthebody,itselfalsohasther
3、adiation,emitsanalphaparticledecay,becometheradonprogeny,thehalf-lifeof3.825days.Radonmeasurementcanbeusedtoexploretheuraniumdepositinrecentyearshasdevelopedtocanbeusedforoilexploration,isofgreatsignificanceinthesearchforcleanenergy.Ouruseofwaterradonvariationofearthquakepredictionhasbeen40yearsofhi
4、story,therecentinternationalandsoilatmospheretopredictearthquakeshavenewbreakthrough.Inrecentyears,theWorldHealthOrganizationannouncedthenaturalradiationpeopleby50%iscausedbyradonandradonintheenvironmentofinhaledtoomuchcancauselungcancerandotherdiseases,thereforetheradonmeasurementhasgraduallybecome
5、atopicofpublicconcern.Acomprehensiveunderstandingofinstrumenttypes,principleandapplicationforpeopletopaymoreattentionto.ClassificationoftheradonmeasurementinstrumentMeasuringmethodandinstrumentofradonandradonmany,thereareabout30more.ThephysicochemicalpropertiesofradonRadonisacolorlessodorlesstranspa
6、rentunitofinertgasinthestandardstate,densityis9.73kg/m3.Whenthetemperaturedroppedto-65Cintoaliquid,itsdensityis5.7x103kg/mol.Thetemperaturedroppedfurtherto-71Cbecomeshinyorangesolid.Radonisaninertgas,isnoteasytoproducechemicalreaction.Radondecayhalf-lifeof3.825d,whentheenergyofalphaparticlesemittedb
7、y5.49MeV.Radoncanbedissolvedinwaterandotherliquids,itiseasytodissolveinthebloodandfat,canbedissolvedintherubber,thelyticfactor(theratioconcentrationintheairoftheliquidsampleand)hascloserelationwithtemperature,pressure.Atthesametimeradon+adsorptioneasilyactivatedcarbon,clayandotherporousmaterials.Act
8、ivatedcarbonadsorptioncoefficientisafunctionoftemperature,thetypicalvalueslistedintable-1.ActivatedcarbonadsorptioncoefficientTemperatureC-12016405075100200adsorptioncoefficient15Y50631022358406302701430Note:theadsorptioncoefficientisurticantpergramofactivatedcarbon(Bq/m3)ratio.1) Basicknowledgeofra
9、dondetectoraccordingtothedifferentsituationtoclassificationdeterminationDividedintothesoilradonmeasurementmethodofradonintheair,amethodforthedeterminationofradoninwater,thedeterminationmethodofthreecategories,eachcategoryalsoincludesanumberofMethods.2) accordingtothedifferentpurposesofmeasuringradon
10、,tookdifferentapproachesUseofradontosearchforuraniumandthoriumdepositsforearthquakeprediction,oil,etc.,determinationandtheenvironmentortheindoorradon,themethodwillbedifferent.3) accordingtothedeterminationofisotopicspeciesofdifferentclassificationDirectmeasurementofradonitself,orindirectlymeasuringr
11、adonfirstgenerationprogenyofradium(RaAA;itsPo)ofradioactive,thisalsoisakindofclassificationmethod.accordingtothedifferentsamplingmethodstoclassifyCanpumpportionoftheatmosphere(air,waterorsoilgas)todeterminethegrab,ormaybepassivetype(passive)waitforradonspreaditselftodetectorandaccumulatedforaperiodo
12、ftimeaftertheprobetoanalysis.Theformeriscalledwarmmethod(differential)measurement,andthelatteriscalledthecumulativesummethod(integral)measurement.ListofradondetectorContinuousmeasuringradonanditsprogenyIntroductionRadonanditsprogenycontinuousmeasuringinstrumentforportablerealtimecontinuousmeasuremen
13、tofradonconcentrationandradonconcentrationandtotalpotentialmultifunctionalinstrument,astheactivesamplingstructure,hastheadvantagesoftypical,canbeusedinundergroundengineering,mining,tourismcave,nuclearfacilities,placesassociateduraniumseriesandindoorenvironmentalradonmeasurement,healthsupervisionande
14、valuationofradioactivedetection,isasearchforradon,radonsource(th)devicemanagement,radiationsafetyevaluationandothernecessary,withtheradiationeffectonApplicationStudyonestimationofradonandradondosemonitoringrequirements.Availableforimmediateresults,simpleoperation,easytocarry,suitableforlarge-scalesu
15、rveyradonlevel.C) Conditionsofuseenvironmenttemperature:-10C45CRelativehumidity:95%b)powersupply:6Vbattery,equippedwithcharger,batterychargingtimecanworkfor6hours;canalsobeusedAC220/50Hz.A) Themaintechnicalperformance:asemiconductordetector,thedetectorhastheadvantagesofsmallsize,fastresponse,insensi
16、tivetogamma.B) instrumentbackground:2cpm.Sensitivity:1.2x10cps/Bq/m(RN).C) detectionefficiencyofPu-anorpointsource:40%(2ncountingcapacityof99999999;measuringrange:radon/radonconcentrationof2-110Bqx/m,potentialconcentration:1x10-10J/m.D) tomeasurethetimeinterval:1(measurementofradonconcentration),3(subbodyandpotentialmeasurement)are26min,namely26givesresults;2for1100minutesaccordingtotheradonl
