Cooper极小值对基态原子多光子电离谱的影响

The effects of cooper minima on the multiphoton ionization spectra of ground state neutral atoms

考虑到残留离子势对末态光电子的影响，利用ＨＦＳ自洽场方法和改进的ＫＦＲ方法，研究了在圆偏振强激光场中，基态原子外壳层电子的多光子电离过程。发现在现有条件下，Ｃｏｏｐｅｒ极小值对ｐ，ｄ态电子的多光子电离谱没有影响，或者影响甚微，对ｓ态电子多光子电离谱的影响是广泛和深刻的，而且这一影响的程度与光子的能量和光场强度有较强的依赖关系。

Within the framework of the central field approximation, the modified Keldish Faisal Reiss theory with the consideration of the effects of the residual ion on the final photoelectron and the Hartree Fock Slater self consistent field theory were used to study the multiphoton ionization process of the outer subshell' electrons for ground state neutral atoms in intense circularized laser fields. Under the current condition, Cooper minima have no or few effects on the multiphoton ionization spectra of the p,d states' electrons, but deeply and widely affect spectra of the s states' electrons. Also it has been found that the degrees of the effects depend on the photon energy and intersity of the laser fields deeply.