Maillard, Yves-Patrick Dousse, Jean-Claude Hoszowska, Joanna Berset, Michel Mauron, Olivier Raboud, Pierre-Alexandre Kavčič, Matjaz Rzadkiewicz, J. Banaś, Dariusz Tökési, K. 2018-07-10 We report on the radiative decay of double K-shell vacancy states produced in solid Ca, V, Fe, and Cu targets by impact with about 10 MeV/amu C and Ne ions. The resulting K hypersatellite x-ray emission spectra were measured by means of high- energy-resolution spectroscopy using a von Hamos bent crystal spectrometer. The experiment was carried out at the Philips variable energy cyclotron of the Paul Scherrer Institute. From the fits of the x-ray spectra the energies, line widths, and relative intensities of the hypersatellite x-ray lines could be determined. The fitted intensities were corrected to account for the energy-dependent solid angle of the spectrometer, effective source size, target self-absorption, crystal reflectivity, and detector efficiency. The single-to-double K-shell ionization cross-section ratios were deduced from the corrected relative intensities of the hypersatellites and compared to theoretical predictions from the semiclassical approximation model using hydrogenlike and Dirac-Hartree-Fock wave functions and from classical trajectory Monte Carlo calculations. application/pdf https://folia.unifr.ch/global/documents/307181 https://folia.unifr.ch/documents/307181/files/dou_hxr.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.98.012705 info:eu-repo/semantics/openAccess License undefined Physical Review A. - 2018, vol. 98, no. 1, p. 012705 info:eu-repo/classification/udc/53 Hypersatellite x-ray decay of $3d$ hollow-$K$-shell atoms produced by heavy-ion impact http://purl.org/coar/resource_type/c_6501