In this thesis, we briefly introduced the basic concepts of intense laser field, relative atomic experimental phenomena and theories on atomic ionization.
本文首先简要介绍了强场物理的基本概念和相关的原子物理现象，以及研究原子电离现象的有关理论。
In this case, many interesting phenomena of excitation and photoionization can be observed, for instance, muti-photon ionization, above threshold ionization, tunnel ionization and so on.
这样，我们就可以观察到一些新的现象，如多光子过程，阈上电离，隧道电离等。
In this case, many interesting phenomena of excitation and photoionization can be observed, for instance, muti-photon ionization, above threshold ionization, tunnel ionization and so on.
这样，我们就可以观察到一些新的现象，如多光子过程，阈上电离，隧道电离等。
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