The effect of electron-electron interaction on positron emission in supercritical collisions of highly charged ions is studied within the monopole approximation using the time-dependent density functional theory and t...The effect of electron-electron interaction on positron emission in supercritical collisions of highly charged ions is studied within the monopole approximation using the time-dependent density functional theory and time-dependent Hartree–Fock–Slater methods.Positron production probabilities and energy spectra are calculated for U–U,U–Cm,and Cm–Cm collision systems,considering both bare nuclei and highly charged ions with partially filled electron shells.The results indicate that the screening of the nuclear potential by electrons as well as Pauli blocking substantially reduce positron production and suppress the characteristic signatures of spontaneous vacuum decay,previously found in collisions of bare nuclei.展开更多
基金supported by the Russian Science Foundation(22-62-00004,https://rscf.ru/project/22-62-00004/)The calculations performed using the TDHFS method were supported by the Theoretical Physics and Mathematics Advancement Foundation"BASIS"(23-1-1-54-3).
文摘The effect of electron-electron interaction on positron emission in supercritical collisions of highly charged ions is studied within the monopole approximation using the time-dependent density functional theory and time-dependent Hartree–Fock–Slater methods.Positron production probabilities and energy spectra are calculated for U–U,U–Cm,and Cm–Cm collision systems,considering both bare nuclei and highly charged ions with partially filled electron shells.The results indicate that the screening of the nuclear potential by electrons as well as Pauli blocking substantially reduce positron production and suppress the characteristic signatures of spontaneous vacuum decay,previously found in collisions of bare nuclei.
