[en] In this work, we derive X-ray production cross-sections from electron-impact ionization cross-sections for Ne, Ar, Kr, Xe, Rn, and Uuo, calculated in the modified relativistic binary-encounter-Bethe model, and using as the only input parameter the binding energies obtained in the Dirac-Fock approach. Radiative and radiationless transition probabilities necessary to compute the inter- and intra-shell atomic yields were calculated in the same approach. Shell electron-impact ionization cross-sections and X-ray production cross-sections are compared with the corresponding cross-sections retrieved from the National Institute of Standards and Technology Reference Database and available experimental data. - Highlights: • X-ray production cross-sections are calculated for several noble elements. • Electron-Impact Ionization cross-sections are computed with the MRBEB model. • Binding energies and atomic yields are obtained with the Dirac–Fock approach. • Comparisons are made with other theoretical models and few available data. • This approach is reliable in producing X-ray production cross-section data.