An angular correlation theory for double photoionization in a rare gas atom

Details An angular correlation theory for double photoionization in a rare gas atom An angular correlation theory for double photoionization in a rare gas atom

2001-06-28

arxiv.org/abs/physics/0106095v1

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevA.65.012702

We consider the process of double photoionization (DPI) in a rare gas atom as a two-step process, namely (i) photoionization in an inner shell followed by (ii) the emission of an Auger electron from an outer shell. An angular correlation function for the two emitted electrons is defined by analogy with the theory of angular correlation in nuclear physics. An expression is obtained for this angular correlation function by a statistical method which makes use of the density and efficiency operators. The latter takes care of the attenuation of the probability of detection of an electrons due to the geometrical properties of the detector. Theoretical values of the angular correlation function are obtained for DPI in xenon and these are shown to be in good agreement with the experimental results given by K\"{a}mmerling and Schmidt.

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