X-ray spectra induced by 129Xeq+ impacting the metal surface

• 来源期刊: 中国科学G辑（英文版）
• 年，卷（期）: 2008,（1）
• 页码范围: 82-89
• 页数: 8页
• 语种: 英文

摘要

Using the slow highly charged ions 129Xeq+ (q = 25, 26, 27; initial kinetic T0≤4.65 keV/a.u.) to impact Au surface, the Au atomic Mα 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 Mα-X-ray spectra, Au atomic N-level lifetime is estimated at about 1.33×10-18 s based on Heisenberg uncertainty relation.