线偏振强光场中的原子电离  

Ionization of atoms in intense linearly polarized optical field

作　　者：卢兴发[1] 陈德应[1] 夏元钦[1] 张杉杉[1] 王骐[1] 

机构地区：[1]哈尔滨工业大学光电子技术研究所,黑龙江哈尔滨150001

出　　处：《哈尔滨工业大学学报》1999年第6期52-55,共4页Journal of Harbin Institute of Technology

基　　金：国家高技术863-410主题项目(863-410-基金-3-7);博士点基金项目;国家自然科学基金资助项目(69688003)

摘　　要：在强场电离的研究中，电离速率是一个重要的参数，其中被广泛引用的ＡＤＫ 模型中描述线偏振强光场中原子隧道电离的电离速率公式存在错误，该错误对理论计算结果有一定影响． 利用修正前与修正后的ＡＤＫ 模型中描述线偏振强光场中原子隧道电离的电离速率公式，以Ｘｅ 原子及其各阶离子为例，对电离速率、阈值光强等参数进行了计算，讨论了公式修正前后对这些参数的理论计算结果的影响，并且利用修正后的公式计算出的阈值光强与相关的实验及理论计算的结果进行了对比，对比结果表明ＡＤＫ 模型和ＢＳＩ模型的计算结果与实验结果符合得很好．For the intense fields, in which ionization rate is an important parameter, there is an error in the ionization rate formula that describes the tunneling ionization of atom in an intense linearly polarized optical field of theADK model, and the error has some effects on the theory calculations . Using the ionization rate formula that describes the tunneling ionization of atom in an intense linearly polarized optical field of the ADK, before and after the formula was modified, taking Xe atom and ions for example,the ionization rates and threshold intensities are calculated, and the influence on the theory calculations of these parameters are discussed, and the threshold intensities using the modified formula are computered and compared with the related experiment and theory. The results show that ADK model and BSI model are in good agreement with the experimental results.

关 键 词：电离速率 隧道电离 阈值强度 

分 类 号：O562.4[理学—原子与分子物理]