Open AccessPrecise measurement of 6Li transition frequencies and hyperfine splitting
Author(s) -
Yuelong Wu,
Rui Li,
Rui Q. Yang,
Haifeng Jiang,
Haibin Wu
Publication year - 2018
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.67.20181021
Subject(s) - hyperfine structure , atomic physics , doppler effect , radius , physics , line (geometry) , computational physics , quantum mechanics , geometry , computer security , mathematics , computer science
In this paper, we report a precision measurement of hyperfine splitting and absolute frequency of D1 line in cold 6Li atoms. The gray molasses is realized in the experiment and the tempreature is cooled to about 50 μK, which is lower than the Doppler cooling limit, 140 μK. By use of an optical comb, the absolute frequencies and corresponding hyperfine splitting are measured. We obtain frequencies of 446789503.080(35) MHz, 446789529.198(36) MHz, 446789731.316(50) MHz and 446789757.476(29) MHz for the D1 line. The results are in reasonable agreement with the theoretical calculations and consistent with earlier measurements. They could provide an important foundation for future frequency measurement, α constant and nuclear radius.