Frequency-Comb Referenced Collinear Laser Spectroscopy of Be+ for Nuclear Structure Investigations and Many-Body QED Tests

Krieger, A.; Nörtershäuser, W.; Geppert, Ch.; Blaum, Klaus; Bissell, M. L.; Frömmgen, N.; Hammen, M.; Kreim, Kim Dieter; Kowalska, Magdalena; Krämer, Jörg; Neugart, R.; Neyens, G.; Sánchez, R.; Tiedemann, D.; Yordanov, Deyan; Žáková, M.

doi:10.1007/978-3-319-64346-5_12

Cited by 2 publications

(3 citation statements)

References 65 publications

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“…The isotopic chain of beryllium contains the proton-rich isotope 7 Be, the stable or reference isotope 9 Be, and the neutron-rich isotopes 10,11,12 Be. Their nuclear charge radii have been measured to high precision in the last years by frequency-comb assisted laser spectroscopy [132,133]. The measurements were motivated by the fact that the singly charged beryllium ion is ideally suited for tests of many-body bound-state QED calculations in three-electron systems and nuclear structure calculations.…”

Section: Nuclear Charge Radiimentioning

confidence: 99%

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The next generation of laser spectroscopy experiments using light muonic atoms

Schmidt

Willig

Haack

et al. 2018

J. Phys.: Conf. Ser.

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Precision spectroscopy of light muonic atoms provides unique information about the atomic and nuclear structure of these systems and thus represents a way to access fundamental interactions, properties and constants. One application comprises the determination of absolute nuclear charge radii with unprecedented accuracy from measurements of the 2S -2P Lamb shift. Here, we review recent results of nuclear charge radii extracted from muonic hydrogen and helium spectroscopy and present experiment proposals to access light muonic atoms with Z ≥ 3. In addition, our approaches towards a precise measurement of the Zemach radii in muonic hydrogen (µp) and helium (µ 3 He + ) are discussed. These results will provide new tests of bound-state quantum-electrodynamics in hydrogen-like systems and can be used as benchmarks for nuclear structure theories. arXiv:1808.07240v1 [physics.atom-ph]

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Section: Nuclear Charge Radiimentioning

confidence: 99%

“…This has led to e. g. sophisticated cluster models of the proton and neutron distribution inside the beryllium nuclei, with major interest in the two halo nuclei 11,12 Be. A detailed overview of the nuclear structure of beryllium is provided by Krieger and co-workers [133].…”

Section: Nuclear Charge Radiimentioning

confidence: 99%

The next generation of laser spectroscopy experiments using light muonic atoms

Schmidt

Willig

Haack

et al. 2018

J. Phys.: Conf. Ser.

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“…We thus take the opportunity to describe these updates. We adopt absolute transition frequencies measured in Nörtershäuser et al (2015) and Krieger et al (2017), which have uncertainties smaller by almost two orders of magnitude in comparison with the previous values (Bollinger et al 1985). We note that the experimental fine structure splitting is in very good agreement with the modern theoretical value (Puchalski and Pachucki 2015), the difference being negligible for our purposes.…”

Section: Hyperfine Structure Of the Be Linesmentioning

confidence: 61%

Detecting weak beryllium lines with CUBES

Smiljanic,

da Silva,

Giribaldi

2022

Preprint

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Beryllium is a light element with one single stable isotope, 9 Be, which is a pure product of cosmic-ray spallation in the interstellar medium. Beryllium abundances in latetype stars can be used in studies about evolutionary mixing, Galactic chemical evolution, planet engulfment, and the formation of globular clusters. Some of these uses of Be abundances figure among the science cases of the Cassegrain U-Band Efficient Spectrograph (CUBES), a new near-UV low-and medium-resolution spectrograph under development for the Very Large Telescope. Here, we report on a study about beryllium abundances in extremely metal-poor stars in the context of the phase A of CUBES. Our motivation is to understand the limits for the detection of weak lines in extremely metal-poor stars of low Be abundances. We analyze simulated CUBES observations, performed in medium-resolution mode, based on synthetic spectra for four mock stars with [Fe/H] ≤ −3.0. We find that detecting the Be lines is possible in certain cases, but is very challenging and requires high signal-to-noise ratio. Depending on the atmospheric parameters of the target stars, and if signal-to-noise per pixel of about 400 can be achieved, it should be possible to detect Be abundances between log(Be/H) −13.1 and −13.6, with a typical uncertainty of ± 0.15 dex. Using CUBES, the required data for such studies can be obtained for stars that are fainter by two magnitudes with respect to what is possible with current instrumentation.

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Frequency-Comb Referenced Collinear Laser Spectroscopy of Be+ for Nuclear Structure Investigations and Many-Body QED Tests

Cited by 2 publications

References 65 publications

The next generation of laser spectroscopy experiments using light muonic atoms

The next generation of laser spectroscopy experiments using light muonic atoms

Detecting weak beryllium lines with CUBES

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