低速Ar q+(q=7—14)离子入射Au表面激发的X射线谱
Xray Spectra Excited in Ar q+(q=7—14) Incidence on Au Surface
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摘要: 研究了高电荷态离子40Arq+(q=7—14)轰击金属Au表面产生的特征X射线谱。 实验结果表明， 在弱束流（nA量级）的情况下， 对于动能相同的入射离子， 当电荷态比较高（q=11）时， 便能有效地激发靶原子的特征X射线， 单离子的X射线产额高达10-8量级。 分析结果显示， 入射离子的势能、 动能和这种相互作用特有的镜像相互作用势能沉积在靶表面， 使靶原子内壳层电子激发和电离， 形成空穴和产生外壳层电子填充空穴辐射特征X射线，特征X射线的产额随入射离子的势能（电荷态）的增加而增加。 The Au atomic Mα characteristic Xray spectrum has been measured for the slow highly charged ions Arq+ (q= 7—14) impacting on Au surface. The result shows that as long as the charge state of projectile is higher（q=11）， the characteristic Xrays of heavy atomic can be effectively excited even though the ionic beam is very weak(nA magnitude)， and the single ionic Xray yield is in the order of 10-8 and increases with potential energies of projectiles.Abstract: The Au atomic Mα characteristic Xray spectrum has been measured for the slow highly charged ions Arq+ (q= 7—14) impacting on Au surface. The result shows that as long as the charge state of projectile is higher（q=11）， the characteristic Xrays of heavy atomic can be effectively excited even though the ionic beam is very weak(nA magnitude)， and the single ionic Xray yield is in the order of 10-8 and increases with potential energies of projectiles.
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