单光子双电子微分截面与反冲动量的关系
On the dependence of one-photon - two-electron differential cross sections on recoil momenta
摘要：
计算了氦原子准自由机制引起的高能非相对论双光电离过程的反冲动量分布及其能量分布。该分布在反冲动量较小时获得局部最大值。这与早期的预测和最近获得的实验数据一致。我们还得到了角关联，达到最大值的“背靠背”的光电子配置。我们的分析在所有高能非相对论区都是有效的。当光子的波长大大超过原子的大小时，特殊的方程是正确的。我们目前的数值计算结果的光子能量在该地区的1千电子伏，在最近的实验中采用。
英文摘要：
We calculate the distributions in recoil momenta and their energy distributions for the high energy non-relativistic double photoionization of helium caused by the quasifree mechanism of the process. The distributions obtain local maxima at small values of the recoil momenta. This is in agreement with the earlier predictions and with recently obtained experimental data. We obtained also the angular correlations, which reach the largest value in the "back-to-back" configuration of the photoelectrons. Our analysis is valid in all high energy nonrelativistic region. Particular equations are true for the case when the wavelength of the photon exceeds strongly the size of the atom. We present numerical results for the photon energies in the region of 1 keV, employed in the recent experiments.
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