权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Research on the resonant phenomena with the inner shell excitation (resonant emission in x-ray spectra, decay of the core exciton)

内壳激发共振现象研究（X射线光谱共振发射、核心激子衰变）

基本信息

批准号：
60460034
负责人：
TSUTSUMI Kenjiro
金额：
$ 4.54万
依托单位：
University of Osaka Prefecture
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

项目摘要

The decay process of the core exciton was studied by measuring the photoelectron spectra of lithium- and sodium-halides. The valence-band spectrum as well as the Auger peak is enhanced at the photon energy close to the excitation energy of the core exciton. Two nonradiative decay processes of the core exciton were proposed. The decay probabilities of the core exciton through these two processes were estimated from the photoelectron and the absorption spectra. Some trlaxation phenomenon of the core exciton was found during the decay of the core exciton. The extra peak, whose intensity and energy position depend strongly on the polarization of the radiation incident on the sample, was observed in the constant-initial-state spectra of NaCl and NaBr on the lower energy side of the peak due to the bulk exciton and was ascribed to the decay peak of the surface-core exciton. The Sm M_<4,5> emission and characteristic isochromat spectra of Sm metal and SmB6, and the La M_<4,5> fluorescent emission spectrum of La metal were measured to obtain the informaton on the 4f state with the 3d core hole. An electron-beam energy larger than the energy of the resonant emission and also the threshold of the 3d_<5/2> level is required for the generation of the resonant emission (3D<-1(1)572>4f^<n+1>-> 3d^<10>4f^n), where in is equal to 5 for the Sm3+ion. The hole-induced shakedown process was observed in the M_<4,5> fluorescent emission spectrum of La metal. The N_<4,5> emission spectra of LaB_6 and CeB6 were measured to investigate the radiative decay of the 4d excited states. These spectra show the intense and broad emission peak above the N_<4,5> threshold in addition to the sharp peaks below the threshold. These peaks were attributed to the radiative decay of the 4d^94f^<n+1> excited states.

通过测量锂卤化物和钠卤化物的光电子能谱，研究了芯激子的衰减过程。当光子能量接近芯激子的激发能时，价带谱和俄歇峰都得到增强。提出了芯激子的两种非辐射衰变过程。由光电子和吸收谱估算了芯激子在这两个过程中的衰变几率。在芯激子的衰减过程中，发现了芯激子的一些反常现象。额外的峰，其强度和能量的位置强烈地依赖于入射到样品上的辐射的偏振，观察到在NaCl和NaBr的恒定初始状态的光谱上的峰的较低能量侧由于体激子，并归因于衰减峰的表面-芯激子。测量了Sm金属和SmB_6的SmM_（4，5）发射谱和特征等色谱，以及La金属的LaM_（4，5）荧光发射谱，得到了具有3d中心空穴的4f态的信息。为了产生共振发射（3D<-1（1）572>4f^<n+1>-> 3d^4f ^n），需要大于共振发射的能量以及3d_<5/2>能级的阈值的电子束能量<10>，其中对于Sm 3+离子，in等于5。在La金属的M <4，5>荧光发射谱中观察到空穴诱导安定过程。测量了LaB_6和CeB_6的N_（4，5）发射光谱，研究了4d激发态的辐射衰减。这些谱图除了在N_<4，5>阈值以下出现尖锐的发射峰外，还在N_<4，5>阈值以上出现强而宽的发射峰。这些峰归因于4d^94f^<n+1>激发态的辐射衰变。