Abstract
Pronounced spectrally extended quadrupole X-ray emission has been theoretically predicted in resonant inelastic scattering of two photons near the ionization threshold energy of the 1s shell of a free multielectron atom. The observed double differential scattering cross section is estimated quantitatively. The results predicted for the Ar8+ ion possibly concern the problem of identification of X-ray emission spectra near 3.5 keV from galaxies and clusters of galaxies.
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Russian Text © The Author(s), 2019, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2019, Vol. 109, No. 10, pp. 662–665.
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Hopersky, A.N., Nadolinsky, A.M. X-Ray Quadrupole Emission in the Scattering of Two Photons by a Multicharged Atomic Ion. Jetp Lett. 109, 638–641 (2019). https://doi.org/10.1134/S0021364019100102
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DOI: https://doi.org/10.1134/S0021364019100102