The nuclear transition frequency of^(229)Th is highly dependent on the ionic charge state.We investigate the field shift and hyperfine interaction(HFI)shift in highly-charged ions(HCIs)^(229)Th^(86+)and^(229)Th^(87+)....The nuclear transition frequency of^(229)Th is highly dependent on the ionic charge state.We investigate the field shift and hyperfine interaction(HFI)shift in highly-charged ions(HCIs)^(229)Th^(86+)and^(229)Th^(87+).Our results demonstrate that these shifts are at least three orders of magnitude larger in HCIs than in low-charged ions(LCIs).This high sensitivity makes HCIs promising candidates for studying electron??nucleus interactions and determining nuclear parameters.Additionally,in the stretched hyperfine states of the^(229)Th^(87+)ground level,the HFI shift becomes comparable to the field shift and is enhanced by four orders of magnitude relative to that in LCIs.Consequently,if highly-charged Th ions are used for clock applications,the HFI shift must be properly accounted for.展开更多
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant Nos.XDB0920100 and XDB0920101)the National Natural Science Foundation of China(Grant Nos.12174402,12393821,12274417,12274423)the Chinese Academy of Sciences Project for Young Scientists in Basic Research(Grant No.YSBR-055)。
文摘The nuclear transition frequency of^(229)Th is highly dependent on the ionic charge state.We investigate the field shift and hyperfine interaction(HFI)shift in highly-charged ions(HCIs)^(229)Th^(86+)and^(229)Th^(87+).Our results demonstrate that these shifts are at least three orders of magnitude larger in HCIs than in low-charged ions(LCIs).This high sensitivity makes HCIs promising candidates for studying electron??nucleus interactions and determining nuclear parameters.Additionally,in the stretched hyperfine states of the^(229)Th^(87+)ground level,the HFI shift becomes comparable to the field shift and is enhanced by four orders of magnitude relative to that in LCIs.Consequently,if highly-charged Th ions are used for clock applications,the HFI shift must be properly accounted for.
