期刊
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA
卷 44, 期 3, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4922255
关键词
laser spectroscopy; line shapes, widths, and shifts; metrology; nonlinear optics; ultraviolet source
资金
- LABEX Cluster of Excellence FIRST-TF [ANR-10-LABX-48-01]
- PROCADIS Project [ANR-2010-BLANC:04150]
We report the latest advances in the Doppler-free spectroscopy of the 1S-3S transition in hydrogen. A new continuous ultra-violet source has been developed and delivers a power level of 15 mW. With this setup, the statistical uncertainty on the 1S-3S transition frequency measurement is 2.2 kHz. Combined with the 1S-2S frequency, absolute accuracy at that level would significantly enlighten the proton radius puzzle. (C) 2015 AIP Publishing LLC.
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