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

被引：101
作者：
Sansonetti, Craig J. [1 ]
Simien, C. E. [1 ]
Gillaspy, J. D. [1 ]
Tan, Joseph N. [1 ]
Brewer, Samuel M. [1 ,2 ]
Brown, Roger C. [1 ,2 ]
Wu, Saijun [1 ]
Porto, J. V. [1 ]
机构：
[1] NIST, Gaithersburg, MD 20899 USA
[2] Univ Maryland, College Pk, MD 20742 USA
来源：
PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 02期
关键词：
HYPERFINE-STRUCTURE; RESONANCE LINES; FINE; LI-7; SPECTROSCOPY; LITHIUM;
D O I：
10.1103/PhysRevLett.107.023001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：4
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