Study On Europium Ion Praseodymium Ion Doped Optical Properties Of High Density Scintillating Glasses

With the rapid development of high-energy physics, nuclear physics and spaceexploration in recent years,there is growing demand for scintillator material in the current,traditional scintillation crystal material is most used, for its resistant to radiation,rapiddecay,high light output and other excellent features,it plays an important role in manyapplications.however,due to traditional scintillation crystal material production`s longcycle period,difficulty of mass production,complexity of manufacturing processes andother causes. traditional scintillation crystal material is expensive thus limits its range ofapplication.recently,resarch of the replacement of actual practical application of thescintillation crystal scintillation materials becomes research hot spot.large flash densityoxide glass （HMO） becomes the focus of current research direction for its largedensity,excellent light performance,easiness of components adjustment,simpleness ofmanufacturing method,large size production and other advantages.In this paper,research of property of europium and praseodymium-doped Gd₂O₃-dopedoxide-based scintillation glass are carried out respectively.through analysis ofdensity,absorption spectroscopy, fluorescence spectroscopy,emssion spectra under X-rayexcitation and other physical properties and luminescence properties,the influence of differentheavy metallic oxide composition concentration and sensitizer in the glass composition to theproperty of scintillation glass and its mechanism were discussed.the qualitative analysis ofconcentration quenching,energy transfer mechanism of dopant ions provides theoreticaland experimental basis for the research of scintillation glass qualitative analysis of fluorescencequenching, energy transfer mechanism in glass base offers better theoretical and experimentalbasis for further research of scintillation glass.The first chapter of the thesis introduces concepts and classifications of scintillationmaterials,and summarizes the illuminant principle of scintillation materials.characterization of scintillator has been discussed which leads the brief analysis ofcurrent application of scintllator.The second chapter of the thesis introduces different classification of scintillationglass,which is the object of study,then compares characteristics of different rare earth ions doped scintillation glass,and explains the reason of research of praseodymium ion andeuropium ion dope rare earth ions in scintllation glass.The third chapter of the thesis provides several basic theories which are involved inthis paper,including glass-forming theory, luminescence theory of rare earth ion and Judd-Offelttheory.in chapter four summarizes experiment preparation process of scintillation glass,includingexperiment al content,experimental material,equipments which are required to prepare for galsssample,test equipment, test methods and introduction of experimental process.In chapter V, we discussed Eu³⁺doped TeO₂-ZnO-La₂O₃scintillation glasssystem,differential thermal properties and density of tellurite glass sample with differentEu₃+concentration,tested absorption spectra excitation and emission spectroscopy and scintillationspectrum under x-ray excitation of the samples,calculated emission spectra intensity λ（λ=₂,4）according to J-O theory.by comparing the performance of the samples, we discussed the principleof spectral properties which change with La₂O₃content and Eu₃+concentration in base material.Chapter VI introduces scintillation glass performance which takes Eu₃+ion as scintillationcenter in Eu₃+doped SiO₂-B₂O₃-Al₂O₃-Gd₂O₃Oxide glass matrix system.Density, absorptionspectra, excitation spectra, emission spectra and emission spectra under x-ray excitation and otherproperties have been tested.The physical and chemical impact of different Gd₂O₃content to theEu₃+doped scintillation glass has been investigated.Chapter VII introduces properties of Pr³⁺centered scintillation glass in Pr³⁺doped Si0₂-B₂0₃Al₂0₃-Gd₂0₃matrix system.density thermal stability,absorption spectra, fluorescence spectra andemssion spectra performance under x-ray excitation have been tested.the law of influence ofdifferent components in matrix to various performance of scintillation glass has been studied. Pr³⁺doped oxide scintillation glass has a great potential applications in many areas,such as nuclearphysics, space exploration physics.In the last chapter,a complete conlusion of content and results involved in the paper has beebmade.and some innovative ideas and research results in the paper have been presented.at the sametime,shortcomings of this thesis and envision of further research also have been pointed out.