Probing atomic and nuclear properties with precision spectroscopy of fine and hyperfine structures in the 
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 ion

Guan, Hua; Chen, Shaolong; Qi, Xiao-Qiu; Liang, Shiyong; Sun, Wei; Zhou, Pingwei; Huang, Yao; Zhang, Peipei; Zhong, Zhen-Xiang; Zhou, Yan; Drake, G. W. F.; Shi, Tao; Gao, Kelin

doi:10.1103/physreva.102.030801

Cited by 20 publications

(4 citation statements)

References 27 publications

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“…From this measurement, the two-electron Lamb shift could be experimentally determined with 1.5 MHz precision, dominated by the uncertainty in the nuclear radius. Considering the ongoing experiments aim to obtain an accuracy of the order of 100 kHz [66], an order-of-magnitude improvement in the radius would allow for the missing α 8 (α denotes the fine structure constant) theory contribution of the order 3 MHz, to be determined with an uncertainty of 10% [64]. Moreover, this effect can be downscaled to the analogous transition in the helium atom and to shed light on the observed, and recently confirmed, deviations between experiment and theory [67,68].…”

Section: Qed and Beyond Standard Model (Bsm)mentioning

confidence: 99%

Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei

Ohayon,

Abeln,

Bara

et al. 2024

Physics

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We, the QUARTET Collaboration, propose an experiment to measure the nuclear charge radii of light elements with up to 20 times higher accuracy. These are essential both for understanding nuclear physics at low energies, and for experimental and theoretical applications in simple atomic systems. Such comparisons advance the understanding of bound-state quantum electrodynamics and are useful for searching for new physics beyond the Standard Model. The energy levels of muonic atoms are highly susceptible to nuclear structure, especially to the mean square charge radius. The radii of the lightest nuclei (with the atomic number, Z=1,2) have been determined with high accuracy using laser spectroscopy in muonic atoms, while those of medium mass and above were determined using X-ray spectroscopy with semiconductor detectors. In this communication, we present a new experiment, aiming to obtain precision measurements of the radii of light nuclei 3≤Z≤10 using single-photon energy measurements with cryogenic microcalorimeters; a quantum-sensing technology capable of high efficiency with outstanding resolution for low-energy X-rays.

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Section: Qed and Beyond Standard Model (Bsm)mentioning

confidence: 99%

Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei

Ohayon,

Abeln,

Bara

et al. 2024

Physics

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“…Calculations of the energy levels in three-body systems such as helium and helium-like ions are rapidly advancing to the point where nuclear-size effects become important [35][36][37]. With these developments, the ongoing experiments in helium-like ions spanning Li-II to C-V [38][39][40] would be sensitive to charge radii at the level of 10 −3 . As with the lighter systems, the efforts with electronic atoms would greatly benefit from new measurements with muonic atoms.…”

Section: Theory Testsmentioning

confidence: 99%

Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory

Antognini¹,

Bacca²,

Fleischmann³

et al. 2022

Preprint

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“…Presently, the transition measurements of He have achieved sub-kHz precision, [16][17] and Li + ions spectroscopy has reached precision at the tens of kHz level. [18][19] B 3+ ions and C 4+ ions spectroscopy have also been measured with high precision in recent work. [20][21] These advancements have propelled the development of few-body QED theories.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Sympathetic Cooling of Helium-like 9 Be 2+

Zhu,

Song

2024

Preprint

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The helium and helium-like atomic systems are of significant interest in the study of few-body systems due to their simple structures. Nevertheless, current spectroscopic assessments of He-like ions, such as Li+ and Be2+, encounter constraints in precision owing to the formidable Doppler effect inherent in ion beam experiments. Addressing this challenge, we propose a methodology of employing ion trap confinement and sympathetic cooling techniques to mitigate the impact of the Doppler effect on 9Be2+ ions. Through molecular dynamics simulations, we investigated the influence of different ion systems on the temperature and efficiency of sympathetic cooling for 9Be2+ ions. Our findings offer valuable insights for future endeavors aimed at conducting high-precision spectroscopic measurements involving trapped and cooled 9Be2+ ions or other He-like ions.

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Probing atomic and nuclear properties with precision spectroscopy of fine and hyperfine structures in the Li+7 ion

Cited by 20 publications

References 27 publications

Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei

Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei

Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory

Simulation of Sympathetic Cooling of Helium-like 9 Be 2+

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