Testing Quantum Electrodynamics in the Lowest Singlet State of Neutral Beryllium-9.
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DOI: 10.1103/physrevlett.121.053001
Abstract: We report spectroscopic results on the 2s2p^{1}P_{1} state in neutral atomic beryllium-9. The absolute frequency for the center of gravity is determined to be 42 565.4501(13)  cm^{-1}, a factor of 130 more precise than the previous experimental… read more here.
Keywords: state neutral; quantum electrodynamics; electrodynamics; testing quantum ... See more keywords