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Abstract

This chapter provides an overview of our understanding of photon–atom interactions involving soft x-rays, hard x-rays, and gamma-rays with “intermediate” photon energies roughly between 1 keV to 1 MeV (37 a.u. to 37 × 103 a.u.). These energies correspond to wavelengths of 1.2 nm to 1.2 pm, where the electronic shell structure of a multielectron atom can be probed, and resonant excitations and deexcitations can be important. Here, we will emphasize the cross sections of various processes, which are independent of the intensity of the incoming electromagnetic field. We explore elastic Rayleigh scattering and inelastic scattering, including photoionization, Auger, Raman, and Compton processes. We describe various experimental methods, Monte Carlo approaches and other applications of the sets of atomic data, all spanning the intermediate energy range.

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Acknowledgements

The author wold like to thank Dr Swaantje Grunefeld, Dr Emily Kahl, Gian Carlo Ruzzi Villacres, and Corey Hanrahan for many discussions and for providingFig. 66.1 and the Rayleigh data in Fig. 66.2. He further thanks Dr Ivan Mikhaylov for providing the 16 data in Fig. 66.2and Professor Christopher Chantler for helpful suggestions. This work was partially supported through an Australian Research Council Future Fellowship FT100100905 at The University of Queensland.

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Correspondence to Michael W. J. Bromley .

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Bromley, M.W.J. (2023). Photon–Atom Interactions: Intermediate Energies. In: Drake, G.W.F. (eds) Springer Handbook of Atomic, Molecular, and Optical Physics. Springer Handbooks. Springer, Cham. https://doi.org/10.1007/978-3-030-73893-8_66

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