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

作　　者：ZHANG XiaoAn 1,2 ,XIAO GuoQing 1 ,YANG ZhiHu 1 ,CHEN XiMeng 3 ,ZHAO YongTao 1 , LI FuLi 4 ,WANG Li 1,2 ,CUI Ying 3 ,ZHANG HongQiang 3 &ZHAN WenLong 1 1Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 2Department of Physics,Xianyang Normal University,Xianyang 712000,China 3Department of Modern Physics,Lanzhou University,Lanzhou 730000,China 4Department of Applied Physics,Xi’an Jiaotong University,Xi’an 710049,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2008年第1期82-89,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.10574132,10274088 and 10405025);the Talent Introduction Project ofXianyang Normal University(Grant No.05XSYK103);the Education Commission Foundation of Shaanxi Province(Grant No.04JK300)

摘　　要：Using the slow highly charged ions 129 Xe q+ (q=25,26,27;initial kinetic T0≤4.65 keV/a.u.)to impact Au surface,the Au atomic Mαcharacteristic 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 10-8and 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 1.33×10-18s based on Heisenberg uncertainty relation.Using the slow highly charged ions 129 Xe q+ (q=25,26,27;initial kinetic T0≤4.65 keV/a.u.)to impact Au surface,the Au atomic Mαcharacteristic 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 10-8and 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 1.33×10-18s based on Heisenberg uncertainty relation.

关 键 词：SLOW highly CHARGED IONS characteristic X-ray level LIFETIME 

分 类 号：O434.1[机械工程—光学工程]