Stieltjes-Tchebycheff calculations in the static-exchange approximation of photoexcitation and ionisation in water

Abstract

Calculations of the variation with photon energy of the photoionisation cross sections to the first three ionic states of water are described, using the Stieltjes-Tchebycheff imaging technique and the static-exchange approximation. The results are compared with experimental data from (e, 2e) spectroscopy and from synchrotron radiation. Good agreement with experiment is found, and the calculations highlight the need for more experimental data, especially at low photon energies.