惰性氣體原子快電子碰撞譜學(xué)的實(shí)驗(yàn)和理論研究.pdf

1、中國科學(xué)技術(shù)大學(xué)博士學(xué)位論文惰性氣體原子快電子碰撞譜學(xué)的實(shí)驗(yàn)和理論研究姓名：苑震生申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：原子分子物理學(xué)指導(dǎo)教師：徐克尊2003.5.1AbstractTheinvestigationontheelectronicstructuresofatomsandtheinteractionbetweenanatomandanotherparticleisanimportantaspectinatomicphysicsOneimp

2、ortantmethod，whichcanbeusedtodothisinvestigation，isfastelectronimpactspectroscopyIntermsofthistopicherewedmcussedbothexperimentallyandtheoreticallytheelectronstructures，thefastelectronscatteringc】r088sectionsandthedynami

3、calcorrelationsofthenoblegasatomsKrArandHeInchapter1，thetheoreticalfundamentalsoftheelectronimpactmethod，theprincipleoftheelectronenergylossspectrometer，thedataprocessingprocedureandtheabsolutecalibrationmethodaredescrib

4、edbrieflyInchapter2and3，experimentallyusmgtheAngularResolvedhighreeolutionfastElectronEnergyLossSpectrometer(AREELS)attheconditionof25keVincidentenergyand5060meVenergyresolution，wemeasuredtheOpticalOscillatorStrengthDens

5、itySPOctra(OOSDS)fortheexcitations0f4p，45or3delectronTheoscflIatorstrengthsforexcitationsofthevalentshell4pelectronwereobtained，andcomparisonsweredonebetweenpresentlyexperimentalandpreviouslyexperimentalandtheoreticalres

6、ultsTheexperimentalresultsofdifferentgroupsagree訥也eachotherapproximatelybutthesemiexperientiallytheomticalresllltsdonotmatchwiththeexperimentalresultsThedelayedmaximuminthephotoabsorptionspectraWaSdiscussedItshouldarisef

7、romthetransitionof4pedFortheexcitationoftheinnervalent4selectron，thediscrepanciesfortheresonantstructuresinprevionselectronimpactresultsandphotoionizationresultsweredarifledinpresentwork，whichconfirmsagainthatthefastelec

8、tronimpactmethodissuitabletomeaatlretheopticaloscillatorstrengthsTheautoionizationRydbergseries4s1no(1S)(n=5，6，7)and4s1rid(1_D)似=4，5，6，7)wereidentifiedwithoutambiguitybytheme，9surenlentat0。2。and4。scatteringanglesTheenerg

9、ylevelsandnaturalwidthsoftheexcitationsofKr3dandAr2pinnershell，includingopticallyallowedandforbiddentransitions，weredeterminedThewidthsoftheseinnershellexcitationsarenearlythe8anlewhichwasinterpretedbytheResonantAugereff

10、ect(RA)Inchapter4，byAREELs，theGeneralizedOscitlatorStrengthDensitySpectra(GOSDS)weremeasuredintheenergyregionfrom56to66eVwiththeincidentenergy25lmVandenergyresolution80meV，atscatteringanglesfrom0。to60，correspondingtothem

11、omentumtransferK2=003～201a11TheF抽oprofileparameters厶and口fortheopticallyallowedtransition2(0，1)1Poandtheopticallyforbiddentransitions2(1，o)1s。and2(1，o)1D。wereobtainedasafunctionofK2WiththehypersphericulcoordinatewaveSmcti

12、ons，thedynamicalcorrelationarediscussedqualitativelySo，anewexperimentalwaytostudydynamicalelectroncorrelationeffectisopenedInchapter5，thewidelyusedRmatrixtheorywasintroducedThen，theGOSDSfortheopticallyallowedexcitationse

13、ries(Is2)1s。_n(o，1)：_1po(n=24)werecalculatedbythismethod，andtheFanoprofileparameters，oand口wereobtainedsequentlySotheelectroncorrelationeffectcanbedescribedbytheseparametersquantitatively，andthetheoreticalresultswerecompa