Two-photon frequency comb spectroscopy of atomic hydrogen

doi:10.1126/science.abc7776

GSTDTAP > 气候变化

DOI	10.1126/science.abc7776
	Two-photon frequency comb spectroscopy of atomic hydrogen
	Alexey Grinin; Arthur Matveev; Dylan C. Yost; Lothar Maisenbacher; Vitaly Wirthl; Randolf Pohl; Theodor W. Hänsch; Thomas Udem
	2020-11-27
发表期刊	Science
出版年	2020
英文摘要	Discrepancy between the proton radius determined from hydrogen and muonic hydrogen spectroscopy data, the so-called “proton radius puzzle,” has been a focus of the physics community for more than a decade now. Using two-photon ultraviolet frequency comb spectroscopy below 1 kilohertz, Grinin et al. report a high-precision measurement of the 1S-3S transition frequency in atomic hydrogen (see the Perspective by Ubachs). Combining this measurement with the data for the 1S-2S transition, the authors obtained the Rydberg constant with improved accuracy and an independent value for the proton charge radius that favors the data from muonic hydrogen. However, the present frequency value differs from the one obtained previously using a different spectroscopic technique, leaving the puzzle still unresolved. Science , this issue p. [1061][1]; see also p. [1033][2] We have performed two-photon ultraviolet direct frequency comb spectroscopy on the 1S-3S transition in atomic hydrogen to illuminate the so-called proton radius puzzle and to demonstrate the potential of this method. The proton radius puzzle is a significant discrepancy between data obtained with muonic hydrogen and regular atomic hydrogen that could not be explained within the framework of quantum electrodynamics. By combining our result [ f 1S-3S = 2,922,743,278,665.79(72) kilohertz] with a previous measurement of the 1S-2S transition frequency, we obtained new values for the Rydberg constant [ R ∞ = 10,973,731.568226(38) per meter] and the proton charge radius [ r p = 0.8482(38) femtometers]. This result favors the muonic value over the world-average data as presented by the most recent published CODATA 2014 adjustment. [1]: /lookup/doi/10.1126/science.abc7776 [2]: /lookup/doi/10.1126/science.abf0589
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/304878
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Alexey Grinin,Arthur Matveev,Dylan C. Yost,et al. Two-photon frequency comb spectroscopy of atomic hydrogen[J]. Science,2020.
APA	Alexey Grinin.,Arthur Matveev.,Dylan C. Yost.,Lothar Maisenbacher.,Vitaly Wirthl.,...&Thomas Udem.(2020).Two-photon frequency comb spectroscopy of atomic hydrogen.Science.
MLA	Alexey Grinin,et al."Two-photon frequency comb spectroscopy of atomic hydrogen".Science (2020).