Core-electron tunneling in diatomics interacting with intense ultrashort-pulsed XUV and X-ray radiation: Theoretical studies

► Intense X-ray and XUV laser fields may induce novel resonant effects in molecules. ► Core-hole localization phenomena influence molecular scattering and photoionization. ► We conducted numerical studies of core-hole localization dynamics in a diatomic ion. ► Localization dynamics can be controlled by the field parameters. ► Intense fields can lead to coherent suppression of inter-well core-hole tunneling.