简介:Thegreenlong-after-glowluminescencefromTb3+-dopedSr2SiO4phosphors,whicharesynthesizedbythehightemperaturesolidstatereactioninareductiveatmosphere,isobservedinthispaper.Theresultsshowthatunderultravioletexcitation,theobtainedphosphorsproduceanintensegreen-lighting-emissionfromtheTb3+,andthegreen-lightinglongafter-glowluminescencerelatedtoTb3+canlasthalfanhouraftertheirradiationsourcehasbeenremoved.Moreover,theeffectsofco-dopingLi+,Dy3+,Er3+,Gd3+,andYb3+withTb3+onthedecaypropertiesandthermoluminescencepropertiesareinvestigatedtoconfirmthelong-after-glowmechanism.
简介:IsotopesTemperaturein40Ar+158Tband108AgReactionsat30MeV/u¥DaiGuangxi;FuYanbiao;HeZhiyong;DuanLimin;LiZuyuandZhangBaog?..
简介:FissionwithCompanionofParticlesEmissionin40Ar+159TbandnatAgReactionsat30MeV/u¥DaiGuangxi,FuYanbiao,HeZhiyong;DuanLimi?..
简介:AnEmissionofComplexParticlesinCoulombInstabilityinReactions30MeV/u40Ar+159TbandnatAg¥DaiGuangxi,;FuYanbiao;HeZhigong;?..
简介:ComparisonbetweenThreefoldFragmentationandSequentialFissionin40Ar+159TbReactionsat30MeV/u¥DaiGuangxi;FuYanbiao;HeZhiyong...
简介:EvaporationofIntermediate-massFragmentsfromHot-nucleiProducedby25MeV/u40ArBombarding159TbTarget¥JiangDongxing;...
简介:目的:水合物沉积物开采过程是一个热。水.力.化多场耦合过程,该过程包含了不同土层间的热对流、压缩引起的局部变形以及胶结结构破坏引起的应力松弛。不适当的开采会引起出砂、塌孔等破坏问题。本文旨在建立天然气水合物沉积物多场耦合计算模型,以量化由开采引起的地质灾害风险。创新点:1.通过GOMSOLMultiphysics实现水合物开采过程多场耦合有限元控制方程的计算:2.建立的模型考虑变形.渗流双向全耦合过程。方法:1.通过理论推导,给出开采天然气水合物过程模拟的控制方程;采用偏微分方程模块实现除力学之外其他物理场的耦合计算;采用结构力学模块实现变形计算。2.通过与试验数据进行比较验证模型的可靠性。3.通过对比全耦合模型与半耦合模型,分析双向耦合对水合物开采过程中沉积物物理力学行为的影响。结论:1.所建立模型能够精确模拟水合物开采过程中沉积物的物理力学行为。2.当考虑压缩对渗流的影响时,由于孔隙率的降低,计算得到的水合物分解速度要小于不考虑该影响时的速度。3.由于存在层间对流效应,非均质模型计算得到的水合物分解速度要快于均质模型。