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Study of Charge Transfer Reactions by Multiply Charged Ions in the Low Energy Region from 0.5 to 1000 eV.

研究 0.5 至 1000 eV 低能量区域中的倍增带电离子的电荷转移反应。

基本信息

批准号：
62490013
负责人：
OKLUNO. Kazukiho
金额：
$ 3.71万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

This project has started placing gteat importance on the development of an ion source for production of multiply charged ions which is indispensable for the low energy collision experiments of multiply charged ions.(1). By taking a new idea of cooling the solenoid in liquid nitrogen, thus the development of a small size ion source of an EBIS type (mini-EBIS) has been succeeded. This idea has been proved to be very effective to make EBIS and its power supply small, moreover for achievement of very low pressure.(2). The constructed "mini-EBIS" has been connected to the low energy ion collision apparatus which is a tandem mass spectrometer with an octo-pole ion beam guide (OPIG), and its performance has been measured as follows. The mini-EBIS can produce fully stripped ions of low Z elements, C^<6+>, N^<7+> nad O^<8+>, and highly charged ions of high Z elements, Ne^<9+> and Ar^<16+>. Energy spread of extracted ions from the mini-EBIS is about 0.4xq eV (FWHM).(3). Finally, for the first trial, we have measured a new data of cross sections for single- and double-electron capture processes in low energy C^<4+>-He and Ne^<4+>-He collisions from 1 to 2000 eV in the center-of-mass systems. Thus, it is proved by the present project that cross section measurements have become to possible in the low energy collision including multiply charged ions.

本计画已开始重视发展多电荷离子低能碰撞实验所需的多电荷离子源。（一）.采用液氮冷却螺线管的新思路，研制成功了小型EBIS型离子源（mini-EBIS）。这一想法已被证明是非常有效的，使EBIS和它的电源小，而且为实现非常低的压力。（二）、构建的“mini-EBIS”已连接到低能离子碰撞装置，这是一个串联质谱仪与单极离子束导向器（OPIG），其性能已被测量如下。微型EBIS能产生低Z元素C^<6+>、N^<7+>和O^<8+>的完全剥离离子和高Z元素Ne^<9+>和Ar^<16+>的高电荷态离子。从微型EBIS提取的离子的能量扩展为约0.4xq eV（FWHM）。（三）、最后，作为第一次实验，我们测量了低能C^<4+>-He和Ne^<4+>-He碰撞中单电子和双电子俘获截面的新数据，能量范围从1到2000 eV。因此，本项目证明了在低能多电荷离子碰撞中进行截面测量已成为可能。