Absolute Transition Frequencies and Quantum Interference in a Frequency Comb Based Measurement of the Li-6,Li-7 D Lines

作者：Sansonetti Craig J^*; Simien C E; Gillaspy J D; Tan Joseph N; Brewer Samuel M; Brown Roger C; Wu Saijun; Porto J V

来源：Physical Review Letters, 2011, 107(2): 023001.

DOI：10.1103/PhysRevLett.107.023001

Optical frequencies of the D lines of Li-6,Li-7 were measured with a relative accuracy of 5 x 10(-11) using an optical comb synthesizer. Quantum interference in the laser induced fluorescence for the partially resolved D2 lines was found to produce polarization dependent shifts as large as 1 MHz. Our results resolve large discrepancies among previous experiments and between all experiments and theory. The fine-structure splittings for Li-6 and Li-7 are 10052.837(22) MHz and 10053.435(21) MHz. The splitting isotope shift is 0.599(30) MHz, in reasonable agreement with recent theoretical calculations.

• 出版日期2011-7-6