Nuclear-spin-induced quenching shortens the 2F7/2 lifetime in 173Yb+ enough to suppress the clock-laser AC Stark shift by a factor of ~20 while providing a new reference frequency at 642.11917656354(43) THz.
1) We com- pared two sets of unquenched (pure E3) transitions using π-polarized light
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Nuclear spin quenching of the $^2S_{1/2}\rightarrow {^2}F_{7/2} $ electric octupole transition in $^{173}$Yb$^+$
Nuclear-spin-induced quenching shortens the 2F7/2 lifetime in 173Yb+ enough to suppress the clock-laser AC Stark shift by a factor of ~20 while providing a new reference frequency at 642.11917656354(43) THz.