Ultrahigh-Precision Measurement of the n=2 Triplet P Fine Structure of Atomic Helium Using Frequency-Offset Separated Oscillatory Fields

For decades, improved theory and experiment of the n=2 ^{3}P fine structure of helium have allowed for increasingly precise tests of quantum electrodynamics, determinations of the fine-structure constant α, and limitations on possible beyond-the-standard-model physics. Here we use the new frequency-...

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Veröffentlicht in:	Physical review letters 2018-10, Vol.121 (14), p.143002-143002, Article 143002
Hauptverfasser:	Kato, K, Skinner, T D G, Hessels, E A
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Sprache:	eng
Schlagworte:	Atomic properties Atomic structure Fine structure Helium Quantum electrodynamics
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container_title	Physical review letters
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creator	Kato, K Skinner, T D G Hessels, E A
description	For decades, improved theory and experiment of the n=2 ^{3}P fine structure of helium have allowed for increasingly precise tests of quantum electrodynamics, determinations of the fine-structure constant α, and limitations on possible beyond-the-standard-model physics. Here we use the new frequency-offset separated-oscillatory-fields technique to measure the 2^{3}P_{2}→2^{3}P_{1} interval. Our result of 2 291 176 590(25) Hz represents a major step forward in precision for helium fine-structure measurements.
doi_str_mv	10.1103/PhysRevLett.121.143002
format	Article
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subjects	Atomic properties Atomic structure Fine structure Helium Quantum electrodynamics
title	Ultrahigh-Precision Measurement of the n=2 Triplet P Fine Structure of Atomic Helium Using Frequency-Offset Separated Oscillatory Fields
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