第43卷第2期高师理科学刊Vol.43No.22023年2月JournalofScienceofTeachers′CollegeandUniversityFeb.2023文章编号:1007-9831(2023)02-0049-08SnO分子激发态的理论研究孙铭旭,宋铭彤,桑纪群,姜文,刘晓军,李奇楠,李瑞(齐齐哈尔大学理学院,黑龙江齐齐哈尔161006)摘要:应用高精度组态相互作用的方法研究SnO分子第一解离极限()()33ggSnP+OP18个SΛ-态的电子结构和光谱性质.根据计算结果绘制了势能曲线(PECs),并计算得到束缚态的光谱常数.给出了18个SΛ-态的电偶极矩(DMs)随核间距的变化关系曲线,同时获得了交叉电子态之间的自旋轨道耦合矩阵元素绝对值随核间距变化的规律,并讨论了可能存在的扰动及预解离情况.计算了SnO分子部分束缚态之间的跃迁性质,包括跃迁偶极距(TDMs)和弗兰克-康登因子(FCFs)以及束缚态之间的自发辐射寿命.研究结果对SnO分子电子结构性质后续的实验以及理论研究具有一定的参考价值.关键词:SnO分子;势能曲线;光谱常数;辐射寿命中图分类号:O561文献标识码:Adoi:10.3969/j.issn.1007-9831.2023.02.011TheoreticalstudyontheexcitedstatesofSnOmoleculeSUNMingxu,SONGMingtong,SANGJiqun,JIANGWen,LIUXiaojun,LIQinan,LIRui(SchoolofScience,QiqiharUniversity,Qiqihar161006,China)Abstract:Theelectronicstructureandspectralpropertiesof18SΛ-states,whichbelongtothefirstdissociationlimit()()33ggSnP+OP,werecalculatedbythehigh-levelmulti-referenceconfigurationinteractionmethod.Thepotentialenergycurves(PECs)wereplottedaccordingtothecalculatedresult,andthespectralconstantsoftheboundstateswerecalculated.Thedipolemoments(DMs)curvesofabove18SΛ-statesweregiven,andthechanglawofabsolutevaluesofthespin-orbitcouplingmatrixelementsalongwiththebondlengthwereobtained.Thepossibleperturbationandpre-dissociationwerediscussed.ThetransitionpropertiesofpartialboundstatesofSnOmolecule,includingtransitiondipoledistances(TDMs),Frank-Condonfactors(FCFs),andradiativelifetimebetweenboundstateswerestudied.TheresearchresultshaveacertainreferencevalueforthesubsequentexperimentalandtheoreticalresearchontheelectronicstructureofSnO.Keywords:Tinoxidemolecule(SnO);potentialenergycurves;spectroscopicconsta...