Measurement of the Frequency of the 2 ^{3}S-2 ^{3}P Transition of ^{4}He.
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DOI: 10.1103/physrevlett.119.263002
Abstract: The 2 ^{3}S-2 ^{3}P transition of ^{4}He was measured by comb-linked laser spectroscopy using a transverse-cooled atomic beam. The centroid frequency was determined to be 276 736 495 600.0(1.4) kHz, with a fractional uncertainty of 5.1×10^{-12}. This value is not only… read more here.
Keywords: cancio pastor; pastor phys; transition; frequency ... See more keywords