Hydrogen Spectroscopy: 2S-2P Lamb Shift Transition Frequency

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    Hydrogen Spectroscopy
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SUMMARY

The precise value for the 2S-2P Lamb shift transition frequency in hydrogen is established at 1,057,844.0(2.4) kHz, as referenced from the National Institute of Standards and Technology (NIST) website. This value is currently recognized as the best known to date, with no superior alternative reported in the discussion. The inquiry confirms the reliability of NIST as a primary source for such measurements in spectroscopy.

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Mokdad
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I'm looking for the more precise value for the 2S-2P lamb shift transition frequency.
I found the value 1 057 844.0(2.4) kHz in the National Institute of Standards and Technology website: http://physics.nist.gov/PhysRefData/HDEL/transfreq.html.
Can someone tell me if there is a better value?
Thanks.
 
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I suspect that that is the best value known to date.
 

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