Excitation and Ionization in Heavy Ion-Atom Collisions (Physics)

重离子原子碰撞中的激发和电离（物理学）

• 批准号: 8818347
• 负责人: Quentin Kessel
• 金额: $ 11.02万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-02-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8818347&HistoricalAwards=false
• 关键词: Excitation; Ionization; Heavy; Ion; Atom

The investigation of excitation and decay processes, such as electron and x-ray emission, which takes place when heavy ions collide with heavy ions at low MeV energies, will be continued. A previously unidentified mechanism is responsible for the prompt emission of 20-25 electrons in Kr-Kr and Kr-Xe Systems, ejected in about 10(-17) seconds, with a continuous energy distribution of the emitted electrons. It is planned to study this effect to determine its origin and generality, utilizing two techniques involving single collisions of projectiles scattered through large (one to twenty degree) angles. One experiment will determine ejected electron energies in coincidence with the scattered ion. The second experiment will measure both the scattered ion and the recoil ion charge states in coincidence, to determine how ionization is shared between the two ions. Results will be compared with data for lighter collision systems as well as ion-solid systems, to determined whether apparent common features in the electron emission spectra do have a common origin.

激发和衰变过程的研究，如 电子和X射线发射，当重 离子碰撞重离子在低MeV的能量，将是 持续期间内的 一个先前未被确认的机制 对于Kr-Kr和Kr-Kr中的20-25个电子的瞬发发射， 系统，在大约10（-17）秒内弹出， 发射电子的能量分布。 计划在 研究这种效应以确定其起源和普遍性， 利用两种涉及单个碰撞的技术 射弹散布在大（1至20度） 的角度 一个实验将确定射出的电子 能量与散射的离子重合。 第二 实验将测量散射离子和反冲 离子电荷状态的重合，以确定电离 在两个离子之间共享。 结果将与 较轻碰撞系统以及离子固体的数据 系统，以确定是否明显的共同特征， 电子发射光谱确实具有共同的起源。