Measurement of the He ground state lamb shift via the two-photon 11S-21S transition
Measurement of the He ground state lamb shift via the two-photon 11S-21S transition
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DOI：
10.1103/physrevlett.80.3475
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发表时间：
1998-04-20
影响因子：
8.6
通讯作者：
Eyler, EE
中科院分区：
文献类型：
--
作者：
Bergeson, SD;Balakrishnan, A;Eyler, EE
我们将双光子无多普勒光谱扩展到真空紫外光谱区，以精确测量He 1 S-1-2 S-1在120 nm的跃迁。我们的结果是4984872315(48)MHz。这产生了41104(48)MHz的基态兰姆位移，与理论和其他实验相当一致。一旦激光和波长计量技术得到改进，这种方法具有显著提高精度的潜力。
We have extended two-photon Doppler-free spectroscopy to the vacuum ultraviolet spectral region, to accurately measure the He 1 S-1-2 S-1 transition at 120 nm. Our result is 4984872315(48) MHz. This yields a ground state Lamb shift of 41104(48) MHz, in fair agreement with theory and other experiments. This approach has the potential for significantly better accuracy once improvements in the laser and the wavelength metrology are implemented.