2 S-2(1/2)-4 S-2(1/2) transition of atomic lithium by Doppler-free two-photon spectroscopy - art. no. 012509

摘要

We have investigated the 2 S-2(1/2)-4 S-2(1/2) two-photon transition in atomic lithium by high resolution laser spectroscopy. The frequencies of the two-photon resonances have been measured with an accuracy of better than 1 MHz using a Fabry-Perot wavemeter. The centers of gravity of the 4 S-2(1/2) levels are 35 012.033 582 (26) cm(-1) for Li-7 and 35 011.544 497 (30) cm(-1) for Li-6. The transition isotope shift is 14 662.4 (10) MHz. We have also determined the magnetic hyperfine splitting constant for the 4 S-2(1/2) state for both isotopes. [References: 35]