U. Sterr et al., DETERMINATION OF THE XENON 6S[3 2](2)-6S'[1/2](0) CLOCK FREQUENCY BY INTERFEROMETRIC WAVELENGTH MEASUREMENTS/, Optics letters, 20(12), 1995, pp. 1421-1423
We have determined the wave number of the optical two-photon clock tra
nsition 6s[3/2](2)-6s'[1/2](0) in xenon by interferometrically compari
ng the wavelengths of the 6s [3/2](2)-6p'[1/2](1) (lambda = 450 nm) an
d 6s'[1/2](0)-6p'[1/2](1) (lambda = 764 nm) transitions with an iodine
-stabilized 633-nm He-Ne laser. These measurements determine the frequ
ency of the two-photon transition [4564.610902(13) cm(-1) for Xe-132]
to better than 1 MHz and provide precise values for the isotope shifts
and the hyperfine structures of these transitions.