Charge-state dependence of K-shell x-ray production in aluminum by 2-12-MeV carbon ions.
Charge-state dependence of K-shell x-ray production in aluminum by 2-12-MeV carbon ions.
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DOI：
10.1103/physreva.53.4190
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发表时间：
1996-06
期刊：
影响因子：
--
通讯作者：
Sun;Yu.;Lin;Wang;Duggan;Azordegan;McDaniel;Lapicki
中科院分区：
文献类型：
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作者：
Sun;Yu.;Lin;Wang;Duggan;Azordegan;McDaniel;Lapicki
用Si（Li）探测器测量了电荷态为2 ~ 6+的2 ~ 6 MeV C离子轰击13 Al的K壳层X射线产生截面随电荷态的变化关系。薄Al靶用于确保单碰撞条件。的电子捕获以及直接电离的内壳层电离的贡献被确定通过分析的目标X射线生产的电荷状态的依赖性。测量结果与ECPSSR理论预测的单孔荧光产率进行了比较。ECPSSR理论是基于扰动定态（PSS）理论和靶电子的相对论效应（R），以及射弹的能量损失（E）和库仑偏转（C）。一般来说，该理论给出了合理的协议与数据的碳离子没有{italK}空位，而它高估了数据的碳离子与{italK}空位。在最低能量的数据的显着低估可能与ECPSSR理论中没有考虑的分子轨道效应有关。美国物理学会（American Physical Society）
Charge-state dependence for {ital K}-shell x-ray production cross sections in {sub 13}Al bombarded by 2{endash}12-MeV {sub 6}C ions with charge states from 2+ to 6+ was measured using a Si(Li) detector. A thin Al target was used to ensure single collision conditions. Contributions of the electron capture as well as direct ionization to the inner-shell ionization were determined by an analysis of the charge-state dependence of the target x-ray production. The measurements are compared with the prediction of the ECPSSR theory using a single-hole fluorescence yield. The ECPSSR theory is based on the perturbed stationary state (PSS) formalism and relativistic effects (R) for the target electrons, and energy loss (E) and Coulomb deflection (C) of the projectile. In general, this theory gives reasonable agreement with the data for carbon ions without {ital K} vacancies while it overpredicts the data for carbon ions with {ital K} vacancies. The significant underprediction of the data at the lowest energy is likely associated with the molecular-orbital effect that is not accounted for in the ECPSSR theory. {copyright} {ital 1996 The American Physical Society.}