Abstract

MARTINI, L; BOLL, D. I. R  and  FOJON, O. A. Photoionization of water molecules by high energy photons. Pap. Phys. [online]. 2017, vol.9, n.2, pp.1-10. ISSN 1852-4249.  http://dx.doi.org/10.4279/PIP.090006.

We theoretically study the photoionization of water molecules by high energy photon impact. We develop a model in which the final state wavefunction is given by a Coulomb continuum wavefunction with effective charges and the water molecule bound states are represented using the Moccia's monocentric wavefunctions. We obtain analytical expressions for the transition matrix element that enable the computation of cross sections by numerical quadratures. We compare our predictions for photon energies between 20 and 300 eV with more elaborated theoretical results and experiments. We obtain a very good agreement with experiments, in particular, at enough high energies where there is a lack of elaborated results due to their high computational cost.

Keywords : Photoionization; water molecules; cross sections.

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