Electron capture process by a slow and highly-charged ion in a solid

固体中慢速高电荷离子的电子捕获过程

• 批准号: 11640396
• 负责人: KAGAWA Takashi
• 金额: $ 0.32万
• 依托单位: Nara Women's University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640396/
• 关键词: x-ray spectra; collision of ions; atomic structure; surface of a solid; hollow atom; K α line; electron capture; cascade decay; 原子スペクトル

We summarize our results in the following :(1) We proposed a single-configuration approximation for a wavefunction in the calculation of energy levels in atomic systems having inner-holes to avoid a numerical difficulty due to the variational collapse in the variational calculation of the energies in such a highly excited atom.(2) We have developed the multistep capture and loss (MSCL) model as a stepwise cascade decay model to describe the stabilization in hollow atoms through both the electron capture and Auger decays.(3) The classical over-the-barrier (COB) model has been applied to the calculation of a cross section for the electron capture by the hydrogenic Ar ion colliding with Si atom inside a solid. We have shown that an average rate for the electron capture increases in proportion to the magnitude of the projectile velocity.(4) We have obtained a conclusion from the simulation for the stabilization of Ar hollow atoms that the magnitude of the electron capture rate governs the feature of the K α spectra from Ar hollow atoms observed by Briand et. al..(5) We have shown that the Coster-Kronig transitions lead to the enhancement of the intensity of only K α satellite lines emitted from the states having 7 or 8 L-shell spectator electrons.

我们的研究结果概括如下：(1)我们提出了一种单组态近似的波函数来计算具有内空穴的原子系统的能级。(2)我们发展了多步俘获和损耗(MSCL)模型作为一个阶梯级联衰变模型来描述空心原子中电子俘获衰变和俄歇衰变的稳定性。(3)经典的越势垒(COB)模型被应用于计算电子俘获和俄歇衰变的中空原子的截面氢化Ar离子与固体中的硅原子碰撞时的电子俘获。结果表明，电子俘获率的平均值与入射速度的大小成正比。(4)通过对Ar空心原子的稳定化模拟，得出电子俘获率的大小决定了Briand Et观测到的Ar空心原子的K-α谱特征。(5)我们证明了科斯特-克朗尼格跃迁导致了只有K-α卫星谱线的强度增强，这些谱线是从具有7个或8个L壳层旁观电子的态发出的。

项目成果

T.Kagawa and T.Kawasaki: "Relativistic theory of electron impact excitation of highly-charged ions"National Institute for Fusion Science Research Report, NIFS-PROC. 44. 118-119 (2000)

T.Kakawa和T.Kawasaki：“高电荷离子的电子碰撞激发的相对论理论”国家聚变科学研究所研究报告，NIFS-PROC。

T.Kagawa: "Theoretical analysis of decay processes of inner-hole states of atomic systems"Riken Review. 31. 20-24 (2000)

T.Kakawa：“原子系统内孔态衰变过程的理论分析”Riken Review。

K.Suto and T.Kagawa: "Theoretical analysis of stabilization processes of Ar hollow atoms formed in a solid with the MSCL model"Physica Scripta. T80. 223-225 (1999)

K.Suto 和 T.Kakawa：“用 MSCL 模型对固体中形成的 Ar 空心原子的稳定过程进行理论分析”Physica Scripta。

K.Suto and T.Kagawa: "Theoretical analvsis of stabilization processes of Ar hollow atoms formed in a solid with the MSCL model"Physica Scripta. T80. 223-225 (1999)

K.Suto 和 T.Kakawa：“用 MSCL 模型对固体中形成的 Ar 空心原子的稳定过程进行理论分析”Physica Scripta。

K.Suto and T.Kagawa: "Multistep-capture-and-loss model for stabilization processes of Ar hollow atoms formed in a solid"Phys.Rev.. A63,. (E)019903 (2001)

K.Suto 和 T.Kakawa：“固体中形成的 Ar 空心原子的稳定过程的多步捕获和损失模型”Phys.Rev.. A63，。