Ultrahigh-Precision Measurement of the n=2 Triplet P Fine Structure of Atomic Helium Using Frequency-Offset Separated Oscillatory Fields
| Autor: | T. D. G. Skinner, K. Kato, E. A. Hessels |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Atomic helium Structure (category theory) General Physics and Astronomy chemistry.chemical_element Interval (mathematics) 01 natural sciences Measure (mathematics) 010305 fluids & plasmas chemistry 0103 physical sciences Frequency offset Atomic physics 010306 general physics Constant (mathematics) Helium |
| Zdroj: | Physical Review Letters. 121 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.121.143002 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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