Talk:Unperturbed ground state hyperfine transition frequency of the caesium 133 atom

I created this redirect as a link target for the symbol ΔνCs, which appears in the new (2018) definitions of the SI base units, particularly the second. The text "unperturbed ground state hyperfine transition frequency of the caesium 133 atom" is the exact text used in the definition of the symbol, in the new SI definitions. For now it redirects to Isotopes of caesium, but the target can certainly be changed if there is a more appropriate place it should point.--Srleffler (talk) 02:22, 11 February 2019 (UTC)