共查询到13条相似文献,搜索用时 46 毫秒
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用Nd:YAG及其泵浦的染料激光进行锂原子三步共振电离,求解非饱和共振过程的速率方程,计算基态和激发态的共振吸收截面,给出了电离效率分别与激发,电离速率以及作用时间的变化关系,得出饱和激发电离的流量条件和通量条件等,并进行了讨论。 相似文献
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研究了激光椭偏率对基于光场感生电离(OFI)电子碰撞机制类镍氪(NLK)系统电离参数的影响。计算结果表明,激光椭偏率对NLK系统的电离速率、电离电子剩余能、各电荷态相对集居数随时间的变化以及初始电子能量分布等电离参数的影响较大,圆偏振激光场是实现NLK 32.8 nm X射线激光放大的最佳激励光场。理论计算表明,在圆偏振飞秒激光驱动下,实现NLK 32.8 nm X射线激光放大需要的最低激光强度为3.5×1016W/cm2,最高激光强度为1.6×1017W/cm2,实验估计的激光强度可能在5×1017W/cm2以上。 相似文献
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Stefania Alexandra Iakab Pere Rafols María García‐Altares Oscar Yanes Xavier Correig 《Advanced functional materials》2019,29(45)
Matrix‐assisted laser desorption/ionization mass spectrometry (MALDI‐MS) is widely used in the biomedical field for the label‐free analysis of molecules such as drugs, lipids, peptides, proteins, and biological tissues for molecular imaging. However, organic matrices used in traditional MALDI‐MS applications introduce excessive interferences in the low m/z range. For this reason, nanostructured materials—and in particular silicon‐based LDI strategies—have become a promising alternative, since they provide a much weaker background. Herein, the recent developments in fabrication, functionalization, and practical applications of silicon‐based LDI‐MS methods are reviewed. Also the basic requirements of silicon‐based substrates for optimal LDI analysis by providing an overview of the LDI mechanisms that use silicon‐based substrates instead of organic matrices are reported. Finally, the considerable potential of silicon‐based substrates is discussed, giving suggestions for topics for future research. 相似文献