2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86860The hyperfine splitting in hydrogenlike $^{209}$Bi, $^{203}$Tl, and $^{205}$Tl is calculated with the nuclear magnetization determined from experimental data on the hyperfine splitting in the corresponding muonic atoms. The single-particle and configuration-mixing nuclear models are considered. The QED corrections are taken into account for both electronic and muonic atoms. The obtained results are compared with other calculations and with experiment.8 pages, 5 tables, accepted for publication in Nuclear Instruments and Methods in Physics Research BAtomic Physicstext