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分子高次谐波产生过程中同位素效应的理论研究

Theoretical exploration of the isotopic effect on the generations of the molecular high-order harmonics
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摘要 本文通过求解非玻恩-奥本海默近似条件下的一维含时薛定谔方程比较研究了H+2和HD+分子离子体系高次谐波谱的特征.数值计算结果表明,对于H+2体系干涉最小值对激光强度和分子初始振动态都很敏感,与此不同,HD+分子离子体系的干涉最小值的变化只依赖于初始振动态的选取.此外,借助于时频分布和电离几率,计算结果得到了合理的解释. The isotopic effect on the molecular high-order harmonics generation is studied by numerically solving the one-dimensional time-dependent Schrodinger equation when the model H2+/HD+ ions are exposed to an intense laser pulse. To explain the effect more clearly, not only the ionization probabilities but also the time-frequency profiles are calculated. The results show that the interference minimum is sensitive to the laser intensity and the initial vibrational level for H+ ions; in contrast, it is only dependent on the initial vibrational level for HD+ ions.
作者 韩静 苗向阳
出处 《原子与分子物理学报》 CAS CSCD 北大核心 2014年第1期112-116,共5页 Journal of Atomic and Molecular Physics
基金 国家自然科学基金(11047191) 教育部科技研究重点项目(211025) 教育部高等学校博士学科点专项科研基金(新教师类)(20111404120004) 山西省青年科技研究基金(2009021005)
关键词 高次谐波谱 同位素效应 干涉最小值 High-order harmonic spectrum Isotopic effect Interference minimum
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参考文献15

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