Chemical Selectivity of Laser Ion Source for on-Line Mass Separator

• 作者: Cai, Xicheng Somerville, L.P. Yang, Yongfeng Zhao, Zhizheng
• 来源期刊: 原子核物理：英文版
• 学科: 物理学
• 关键词: LASER ion SOURCE Chemical SELECTIVITY ON-LINE MASS SEPARATOR
• 年，卷（期）: 1997,（1）
• 页码范围: 48-52
• 页数: 5页
• 分类号: O4

摘要

【正】 Thulium(Tm)atoms are resonantly ionized in a hot tube by stepwise excitations us-ing three dye lasers pumped by a series of copper vapor pulsed at a 10 kHz rate.The chemicalselectivity of the laser ion source is measured as a function of temperature of the tubes made ofTa,Nb-Zr and TaC.The chemical selectivity rises from 50 to 10000 with decreasing tube temp-erature and strongly depends on the tube material.A chemical selectivity of about 10000 withhigh efficiencies is obtained with the Nb-Zr and TaC tubes.Such a laser ion source can be usedin on-line mass separator to obtain isobarically pure ion beams.