Cross section measurements for single-and multiple-electron capture in slow collisions of multiply charged ions

多电荷离子缓慢碰撞中单电子和多电子捕获的横截面测量

• 批准号: 07804026
• 负责人: OKUNO Kazuhiko
• 金额: $ 1.41万
• 依托单位: TOKYO METROPOLITAN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07804026/
• 关键词: low energy collision; multiply charged ion; charge transfer cross section; single-electron capture; multiple-electron capture; Mini-EBIS; ion beam guide; orbiting effect; 電荷移行反応; 電子捕獲過程; 反応断面積測定; 電子捕獲反応; ビームガイド; 低エネルギー; 電子捕獲断面積; 後方散乱

The purpose of this study is to produce new cross section data for electron capture reactions of multiphy charged ions and to find new scattering phenomena in the low energh region below 1 keV unstudied until now. In this study, we have systematically measured much cross section data for Ar^<q+> (q=6,7,8,9 and 11) -H_2, He and Ne collisions, and Kr^<q+> (q=7,8 and 9) -Ne collisions at low energies below 1 keV and we have found that the orbiting effects due to attractive polarization potential plays an important role in the many electron capture processes rather than in single-electron capture process in the low energy region studied. Especially, it is an exactly new information obtained by this research that multi-electron capture cross sections for Ar^<q+> and Kr^<q+> -Ne collisions have commonly a peculiar minimum structure in their energy dependencies and their energy points taking the minimum structure shift to the higher energy side with increasing the numbers of the projectile's ionic charge and captured electrons. These new results have been elucidated in analytic considerations of the attractive polarization potential. Furthermore, in cross section measurements performed for He^<2+> -O_2, N_2 and CO collisions, we have presented an unexpectedly experimental evidence that the dominant charge transfer process exchanges from the single-electron capture process at high energies to the double-electron capture process in the low energy region. Moreover, all of the accumulated low energy cross section data produced by using an ion beam guided technique has been summarized in graphs and in numerical tables in this study.

这项研究的目的是为多重带电离子的电子俘获反应提供新的截面数据，并在1keV以下的低能区发现新的散射现象。在这项研究中，我们系统地测量了Ar^&lt；q+&gt；(q=6，7，8，9和11)-H_2，He和Ne碰撞，以及Kr^-lt；q+&gt；(q=7，8和9)-Ne碰撞在1keV以下的低能下的大量截面数据，我们发现在所研究的低能区，由于吸引极化势引起的轨道效应在许多电子俘获过程中起重要作用，而不是在单电子俘获过程中起重要作用。特别是，Ar^&lt；q+&gt；和Kr^&lt；q+&gt；-Ne碰撞的多电子俘获截面在能量依赖关系中普遍具有特殊的极小结构，其能量点随入射离子电荷和俘获电子数的增加而向高能方向移动，这是本研究获得的一个全新的信息。这些新的结果已经在对吸引极化势的解析考虑中得到了阐明。此外，在He^&lt；2+&Gt；-O_2，N_2和CO碰撞的截面测量中，我们出人意料地提供了一个实验证据，表明主要的电荷转移过程从高能区的单电子俘获过程转变为低能区的双电子俘获过程。此外，在这项研究中，用离子束引导技术产生的所有累积的低能截面数据都以图表和数值表的形式进行了总结。

项目成果

Kazuhiko Okuno: "Measurements of Charge Transfer Cross Sections of Ar^<9+>(q=6,7,8,9 and 11)Collisions with He and H_2 Targets at Low Energies" American Institute of Physics,AIP.Conf.Proc.360. 867-876 (1995)

Kazuhiko Okuno：“Ar^<9 >(q=6,7,8,9 和 11)在低能量下与 He 和 H_2 目标碰撞的电荷转移截面的测量”美国物理研究所，AIP.Conf.Proc。

Kazuhiko Okuno: "Mini-EBIS report on electron captue in slow collisions of multiply charged ions with neutral targets" Physica Scripta. (in press). (1997)

Kazuhiko Okuno：“关于多电荷离子与中性目标缓慢碰撞中电子捕获的 Mini-EBIS 报告”Physica Scripta。

Kazuhiko Okuno: "Ming-EBIS Report on Electron Capture in Slow Collisions of Multiply charged Ions with Neutral Targets" Physica Scripta. (in press). (1997)

Kazuhiko Okuno：“Ming-EBIS 关于多电荷离子与中性目标缓慢碰撞中电子捕获的报告”Physica Scripta。

Kazuhiko Okuno: "Measurements of charge transfer cross sections of Ar^<q+>(q=6,7,8,9,and 11)" American Institute of Physics,AIP Conf.Proc.360. 867-876 (1995)

Kazuhiko Okuno：“Ar^<q >(q=6,7,8,9,and 11) 电荷转移截面的测量”美国物理研究所，AIP Conf.Proc.360。

Ken Suzuki: "Single-and double-charge-changing cross sections fin slow collisions of Ar^<q+>(q=4-9)with Ne" Physica Scripta. (in press). (1997)

Ken Suzuki：“Ar^<q>(q=4-9)与 Ne 缓慢碰撞的单电荷和双电荷变化横截面”Physica Scripta。