共查询到17条相似文献,搜索用时 78 毫秒
1.
研究了高电荷态离子Arq+(q=16,17,18)入射金属Be,Al,Ni,Mo,Au靶表面产生的X射线谱.实验结果表明,Ar的Kα-X射线是离子在与固体表面相互作用过程中固体表面之下形成空心原子发射的.电子组态1s2的高电荷态Ar16+离子在金属表面中性化过程中,存在的多电子激发过程使Ar16+的K壳层电子激发产生空穴,级联退激发射Ar的Kα特征X射线.Ar17+离子在金属表面作用过程中产生的X射线谱形与靶材料没有明显的关联,入射离子的Kα-X射线产额与其最初的电子组态有关,靶原子的X射线产额与入射离子的动能有关. 相似文献
2.
将超导离子源提供的10—20keV/q Ar16+和Ar17+离子入射到Zr金属表面,在相互作用中产生的X射线谱表明,高电荷态Ar16+离子在金属表面中性化过程中有可能存在多电子激发,使Ar16+的K壳层电子被激发形成空穴,在退激过程中发射特征Kα-X射线.空心原子Ar的K层发射X射线强度随入射离子的动能而减弱,靶原子Zr的L壳层发射X射线强度随入射离子动能的增加而增强.Ar17+的单离子的Kα-
关键词:
高电荷态离子
空心原子
X射线 相似文献
3.
将超导离子源提供的10—20keV/q Ar16+和Ar17+离子入射到Zr金属表面,在相互作用中产生的X射线谱表明,高电荷态Ar16+离子在金属表面中性化过程中有可能存在多电子激发,使Ar16+的K壳层电子被激发形成空穴,在退激过程中发射特征Kα-X射线.空心原子Ar的K层发射X射线强度随入射离子的动能而减弱,靶原子Zr的L壳层发射X射线强度随入射离子动能的增加而增强.Ar17+的单离子的Kα- 相似文献
4.
研究了高电荷态离子129Xe29+入射金属Au、Mo、Be表面产生的特征X射线谱。实验结果表明,在入射离子的动能相同时,Au的Mα1-X射线产额比Mo的Lα1-X、Lα2-X、Lβ 1-X射线总产额高,特征X射线的产额随入射离子动能的增加而显著增加;不同动能的Xe29+入射金属Au、Mo、Be表面均未产生Xe的特征X射线。 相似文献
5.
6.
7.
8.
9.
10.
高电荷态离子与原子碰撞激发原子碰撞物理实验是在研究微观粒子的结构、能级、碰撞过程、能量输运过程的基础上发展起来的.通过粒子与原子的碰撞,使我们对原子的内部结构有更进一步的了解.例如:卢瑟福由α粒子的碰撞实验发现原子中心有一个核,从而他提出了核式原子模... 相似文献
11.
ZhiHu Yang Ying Cui XiMeng Chen ZhangYong Song JianXiong Shao FangFang Ruan HongQiang Zhang Juan Du YuWen Liu ZhiMing Gao XiaoAn Zhang KeXin Zhu DeYang Yu XiaoHong Cai 《中国科学G辑(英文版)》2008,51(10):1463-1469
The X-ray spectra of Nb surface induced by Ar
q+ (q = 16,17) ions with the energy range from 10 to 20 keV/q were studied by the optical spectrum technology. The experimental
results indicate that the multi-electron excitation occurred as a highly charged Ar16+ ion was neutralized below the metal surface. The K shell electron of Ar16+ was excited and then de-excited cascadly to emit K X-ray. The intensity of the X-ray emitted from K shell of the hollow Ar
atom decreased with the increase of projectile kinetic energy. The intensity of the X-ray emitted from L shell of the target
atom Nb increased with the increase of projectile kinetic energy. The X-ray yield of Ar17+ is three magnitude orders larger than that of Ar16+.
Supported by the National Natural Science Foundation of China (Grant Nos.10774149 and 10405025) 相似文献
12.
Zhang Xiaoan Xiao Guoqing Yang Zhihu Chen Ximeng Zhao Yongtao Li Fuli Zhang Yinping Cui Ying Zhang Hongqiang Xu Xu Shao Jianxiong Zhan Wenlong 《中国科学G辑(英文版)》2006,49(2):203-212
By use of optical spectrum technology, the spectra of X-ray induced by highly charged 40Ar
q+ ions interacting with Au surface have been studied. The results show that the argon Kα X-ray were emitted from the hollow
atoms formed below the surface. There is a process of multi-electron exciting in neutralization of the Ar16+ion, with electronic configuration 1s2 in its ground state below the solid surface. The yield of the projectile Kα X-ray is related to its initial electronic configuration,
and the yield of the target X-ray is related to the projectile kinetic energy. 相似文献
13.
利用低速(V≈0.01 VBohr)高电荷态Krq+ (q=8, 10, 13, 15, 17)离子轰击金属Al表面, 获得了碰撞过程产生的300–600 nm的光谱. 实验结果表明: 低能大流强(μA/cm2量级)离子束入射金属表面, 可产生溅射原子、离子和入射离子中性化后发射的可见光. 随着入射离子势能(电荷态)增加, 碰撞过程中发射谱线的强度增强. 与激发态3d能级相比, 较高的势能可以有效地激发Al原子的电子到较高4s能级.
关键词:
高电荷态离子
可见光发射
离子与表面作用 相似文献
14.
测量了50–250 keV H+和1.0–3.0 MeV Ar11+ 轰击Si表面过程中辐射的X射线. 结果表明, 在Ar11+入射的情况下, 引起了Si的L壳层上3, 4个电子的多电离.计算了Si的K壳层X射线产生截面, 并将两体碰撞近似(BEA), 平面波恩近似, ECPSSR理论计算与实验值进行了对比. ECPSSR理论与质子产生的截面数据能够很好地符合; 而考虑多电离后, BEA理论与Ar11+的实验结果符合较好.
关键词:
X射线
高电荷态重离子
多电离 相似文献
15.
ZHANG Xiao'an XIAO Guoqing YANG Zhihu CHEN Ximeng ZHAO Yongtao LI Fuli ZHANG Yinping CUI Ying ZHANG Hongqiang XU Xu SHAO Jianxiong ZHAN Wenlong 《中国科学G辑(英文版)》2006,49(2)
By use of optical spectrum technology, the spectra of X-ray induced by highly charged 40Arq+ ions interacting with Au surface have been studied. The results show that the argon Kα X-ray were emitted from the hollow atoms formed below the surface. There is a process of multi-electron exciting in neutralization of the Ar16+ion, with electronic configuration 1s2 in its ground state below the solid surface. The yield of the projectile Kα X-ray is related to its initial electronic configuration, and the yield of the target X-ray is related to the projectile kinetic energy. 相似文献
16.
A code has been developed to simulate the neutralization and grazing process of slow highly charged ion Xe^q+ on Al(111) surface under the classical-over-the-barrier model. The image energy gain of Xeq+ ions are calculated and compared with experiment data. The simulation results of image energy gain are in good agreement with the experiment data. Meanwhile, in the present work, the reflection coefficient of incident Xe^q+ on Al(111) surface as a function of the incidence angle, energy and charge state is also studied. 相似文献
17.
报道了利用兰州重离子加速器国家实验室ECR源引出的高电荷态离子207Pbq+(24≤q≤36)入射到Si(110)表面产生的电子发射的实验测量结果.结果表明,高电荷态离子与固体表面相互作用产生的电子发射产额Y与入射离子的电荷态q、入射角度ψ和入射能量E都有很强的关联.首次发现,电子发射产额Y与入射角度ψ间有接近1/tanψ的关系.理论分析认为,这些过程与基于经典过垒模型的势能电子发射过程密切相关.
关键词:
高电荷态离子
经典过垒模型
电子发射产额 相似文献