Collective Phenomena During Slow Ions / Metastable Atoms Neutralization / De-excitation at Solid Surfaces

固体表面慢离子/亚稳原子中和/去激发期间的集体现象

• 批准号: 12640317
• 负责人: NAZAROV Vladimir
• 金额: $ 1.92万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640317/
• 关键词: EELS; MDS; ILEED; response function; nonlinear response; 電子エネルギー損失分光; 準安定原子; 表面電子系応答関数; 準安定原子脱励起

The purpose of this project has been the application of the theoretical techniques of the dynamical response functions calculations to problems of the Electron Energy Loss Spectroscopy (EELS) and slow ions neutralization and metastable atoms de-excitation at solid surfaces.1). The effects of diffraction have been proven to be of major importance in EELS.[V. U. Nazarov and S. Nishigaki, Surf. Sci. 482-485, 640 (2001)]2). The algorithms have been created and the computer codes have been developed to treat the excitation of surfaces by charges with account of the elastic scattering of the latter.3). We have developed an approach in the calculation of inelastic differential cross-sections to the order Z^3, expressed in terms of quadratic retarded density-response functions, deriving by this the formula applicable to describe the electron and positron energy-loss spectroscopy as well as ions scattering.[V. U. Nazarov and S.Nishigaki, Phys. Rev. B65, 094303 (2002)]4). We have proposed a variant of the quadratic response theory which remains valid near and at the plasma resonance and demonstrates that the non-linearity serves itself to restrict the amplitude of plasma oscillations, thus providing a mechanism of nonlinear damping.[V. U. Nazarov, S.Nishigaki, and T.Nagao, Phys. Rev. B 66, 092301 (2002)]

该项目的目的是将动态响应函数计算的理论技术应用于电子能量损失谱（EELS）和慢离子中和以及亚稳态原子在固体表面的去激发问题。衍射效应在EELS中已被证明是非常重要的。[V.联合Nazarov和S.西垣，冲浪。Sci. 482-485，640（2001）]2）。建立了计算表面弹性散射的算法，并编制了相应的计算程序。我们已经发展了一种计算非弹性微分截面的方法，其数量级为Z^3，用二次延迟密度响应函数表示，并由此导出了适用于描述电子和正电子能量损失谱以及离子散射的公式。[V.联合Nazarov和S.Nishigaki，Phys.Rev.B65，094303（2002）]4）。我们提出了二次响应理论的一种变体，该理论在等离子体共振附近和等离子体共振处仍然有效，并证明非线性本身可以限制等离子体振荡的振幅，从而提供非线性阻尼机制。[V.联合Nazarov，S.Nishigaki和T.Nagao，Phys. Rev. B 66，092301（2002）]

项目成果

V. U. Nazarov.: "Inelastic Low Energy Electron Diffraction at Metal Surfaces"Surf. Sci.. 482-485. 640-647 (2001)

V. U. Nazarov.：“金属表面的非弹性低能电子衍射”冲浪。

S.Nishigaki: "A metastable-induced electron spectroscopy study on the promotion of nitridation by oxygen/alkali pre-adsorbates at Si(100)surfaces"Nuclear Instruments and Methods in Physics Research B. (2002)

S.Nishigaki：“亚稳态诱导电子能谱研究在 Si(100) 表面通过氧/碱预吸附物促进氮化”核物理研究仪器和方法 B. (2002)

V. U. Nazarov.: "Inelastic Electron Scattering at Metal Surfaces: the Role of Elastic Scattering"Vacuum. 63. 151-155 (2001)

V. U. Nazarov.：“金属表面的非弹性电子散射：弹性散射的作用”真空。

V.U.Nazarov and S.Nishigaki: ""Inelastic low energy electron diffraction at metal surfaces""Surface Science. (in press). (2001)

V.U.Nazarov 和 S.Nishigaki：“金属表面的非弹性低能电子衍射”表面科学。

V.U.Nazarov: "Nonlinear mechanism of plasmon damping in electron gas"Proceedings of the 21st Werner Brandt Workshop on Penetration Phenomena. (2001)

V.U.Nazarov：“电子气中等离子体阻尼的非线性机制”第 21 届沃纳·勃兰特穿透现象研讨会论文集。