Frequency measurement of the 2 S10-3 D12 two-photon transition in atomic 4He
Abstract
We present precise frequency measurement of the 2 S10-3 D12 two-photon transition in 4He at 1009 nm. The laser source at 1009 nm is stabilized on an optical frequency comb to perform the absolute frequency measurement. The absolute frequency of 2 S10-3 D12 transition is experimentally determined to be 594 414 291.803(13) MHz with a relative uncertainty of 1.6 ×10-11 , which is more precise than previous determinations by a factor of 25. In combination with the theoretical ionization energy of the 3 D12 state, the ionization energy of the 2 S10 state is determined to be 960 332 040.823(24) MHz. In addition, the deduced 2 S10 and 2 S31 Lamb shifts are 2806.864(24) MHz and 4058.130(24) MHz, respectively, which are 1.6 times better than previous determinations, and the fine structure 3 D31-3 D12 is determined to be 101 143.889(29) MHz, improving the precedent determination by a factor of 11.
- Publication:
-
Physical Review A
- Pub Date:
- March 2018
- DOI:
- 10.1103/PhysRevA.97.032516
- arXiv:
- arXiv:1710.08659
- Bibcode:
- 2018PhRvA..97c2516H
- Keywords:
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- Physics - Atomic Physics
- E-Print:
- 5 pages, 6 figures