Collinear Laser Spectroscopy of Helium-like 11B3+

Mohr, Katharina; Buß, Axel; Andelkovic, Zoran; Hannen, V.; Horst, Max; Imgram, Phillip; König, Kristian; Maaß, B.; Nörtershäuser, W.; Rausch, Simon; Sánchez, R.; Weinheimer, C.

doi:10.3390/atoms11010011

Cited by 3 publications

(2 citation statements)

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“…Above lithium, a new experimental program at Technical University Darmstadt, Germany, focuses on transitions in helium-like ions (HLIs) from beryllium to nitrogen [69][70][71][72], with the measurements in 12 C already completed [73,74]. Improved radii are crucial for confronting the results of the Darmstadt campaign with the state-of-the-art calculations, especially if one considers using measurements at a high Z to determine the missing QED contributions, and using these calculations in the measurements with lower Z.…”

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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“…[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. However, the spectroscopic measurement precision of Be 2+ ions lags behind, with only a few tens of MHz level precision reported, [22] significantly lower than that achieved for He atoms.…”

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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