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.

我们将我们的结果总结如下：（1）我们在具有内孔的原子系统的能级计算中提出了波函数的单构型近似，以避免由于变分计算中的变分崩溃而导致的数值困难。 (2) 我们开发了多步捕获和损失（MSCL）模型作为逐步级联衰减模型，通过电子捕获和俄歇来描述空心原子的稳定性(3) 经典的越障 (COB) 模型已应用于计算氢 Ar 离子与固体内 Si 原子碰撞的电子捕获截面。 （4）通过对Ar空心原子稳定性的模拟，我们得到了电子俘获率的大小决定了K α谱的特征： Ar空心原子观察到Briand 等人..(5) 我们已经证明，Coster-Kronig 跃迁导致从具有 7 或 8 个 L 壳层观察电子的状态发射的仅 K α 卫星线的强度增强。

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。

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

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