X-ray spectra induced by Xe-129(q+) impacting the metal surface

作者：Zhang XiaoAn^*; Xiao GuoQing; Yang Zhihu; Chen XiMeng; Zhao YongTao; Li Fuli; Wang Li; Cui Ying; Zhang HongQiang; Zhan WenLong

来源：Science in China - Series G: Physics Mechanics and Astronomy , 2008, 51(1): 82-89.

DOI：10.1007/s11433-007-0081-3

• slow highly charged ions
• characteristic X-ray
• level lifetime

Using the slow highly charged ions Xe-129(q+) (q = 25, 26, 27; initial kinetic T-0 <= 4.65 keV/a.u.) to impact Au surface, the Au atomic M alpha characteristic X-ray spectrum is induced. The result shows that as long as the charge state of projectile is high enough, the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak (nA magnitude), and the X-ray yield per ion is in the order of 10(-8) and increases with the kinetic energy and potential energy of projectile. By measuring the Au M alpha-X-ray spectra, Au atomic N-level lifetime is estimated at about 1.33x10(-18) s based on Heisenberg uncertainty relation.

• 出版日期2008-1
• 单位兰州大学; 中国科学院近代物理研究所; 咸阳师范学院; 西安交通大学