Testing the Stability of Fundamental Constants with the Single-Ion Optical Clock
S Bize, SA Diddams, U Tanaka, CE Tanner… - Physical Review Letters, 2003 - APS
Physical Review Letters, 2003•APS
Over a two-year duration, we have compared the frequency of the H g+ 199 5 d 10 6 s S 1/2
2 (F= 0)↔ 5 d 9 6 s 2 D 5/2 2 (F= 2) electric-quadrupole transition at 282 nm with the
frequency of the ground-state hyperfine splitting in neutral C s 133. These measurements
show that any fractional time variation of<? format?> the ratio ν C s/ν H g between the two
frequencies is smaller than±7× 10-15 yr-1 (1 σ uncertainty). According to recent atomic
structure calculations, this sets an upper limit to a possible fractional time variation of g C s …
2 (F= 0)↔ 5 d 9 6 s 2 D 5/2 2 (F= 2) electric-quadrupole transition at 282 nm with the
frequency of the ground-state hyperfine splitting in neutral C s 133. These measurements
show that any fractional time variation of<? format?> the ratio ν C s/ν H g between the two
frequencies is smaller than±7× 10-15 yr-1 (1 σ uncertainty). According to recent atomic
structure calculations, this sets an upper limit to a possible fractional time variation of g C s …
Over a two-year duration, we have compared the frequency of the 5d106s S1/22(F=0)↔5d96s2 D5/22(F=2) electric-quadrupole transition at 282 nm with the frequency of the ground-state hyperfine splitting in neutral . These measurements show that any fractional time variation of <?format ?>the ratio between the two frequencies is smaller than ( uncertainty). According to recent atomic structure calculations, this sets an upper limit to a possible fractional time variation of at the same level.
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