The theory of the Bohr–Weisskopf effect in the hyperfine structure

Karpeshin, F. F.; Trzhaskovskaya, M. B.

doi:10.1016/j.nuclphysa.2015.06.001

Cited by 23 publications

(34 citation statements)

References 30 publications

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“…The Migdal's finite Fermi system theory was also used for Pb and Bi in [458]. One can also mention the model-independent approach, making an analogy between the Bohr-Weisskopf effect and the internal conversion coefficient anomalies [459]. Table 18 contains the theoretical and experimental values known so far for the ground state of hydrogenlike ions.…”

Section: Hyperfine Structurementioning

confidence: 99%

QED tests with highly charged ions

Indelicato

2019

J. Phys. B: At. Mol. Opt. Phys.

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The current status of bound state quantum electrodynamics calculations of transition energies for few-electron ions is reviewed. Evaluation of one and two body QED correction is presented, as well as methods to evaluate many-body effects that cannot be evaluated with present-day QED calculations. Experimental methods, their evolution over time, as well as progress in accuracy are presented. A detailed, quantitative, comparison between theory and experiment is presented for transition energies in few-electron ions. In particular the impact of the nuclear size correction on the quality of QED tests as a function of the atomic number is discussed. The cases of hyperfine transition energies and of bound-electron Landé g-factor are also considered.

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Section: Hyperfine Structurementioning

confidence: 99%

QED tests with highly charged ions

Indelicato

2019

J. Phys. B: At. Mol. Opt. Phys.

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“…for the 2s 1/2 → 2p 1/2 EUV hyperfine transitions in Li-like and Be-like ions of 141 Pr (Beiersdorfer et al, 2014). Karpeshin and Trzhaskovskaya (2015) have proposed the opposite approach, namely to investigate the nuclear magnetization distribution based on the HFS experimental data for various isoelectronic sequences, as had been demonstrated by Beiersdorfer et al (2001); Crespo López-Urrutia et al (1998a) for the cases of Re and Tl HCI.…”

Section: Nuclear-size Effects: Charge Radius and Magnetization Distrimentioning

confidence: 99%

Highly charged ions: Optical clocks and applications in fundamental physics

et al. 2018

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Recent developments in frequency metrology and optical clocks have been based on electronic transitions in atoms and singly charged ions as references. The control over all relevant degrees of freedom in these atoms has enabled relative frequency uncertainties at a level of a few parts in 10 −18 . This accomplishment not only allows for extremely accurate time and frequency measurements, but also to probe our understanding of fundamental physics, such as a possible variation of fundamental constants, a violation of the local Lorentz invariance, and the existence of forces beyond the Standard Model of Physics. In addition, novel clocks are driving the development of sophisticated technical applications. Crucial for applications of clocks in fundamental physics are a high sensitivity to effects beyond the Standard Model and Einstein's Theory of Relativity and a small frequency uncertainty of the clock. Highly charged ions offer both. They have been proposed as highly accurate clocks, since they possess optical transitions which can be extremely narrow and less sensitive to external perturbations compared to current atomic clock species. The large selection of highly charged ions in different charge states offers narrow transitions that are among the most sensitive ones for a change in the finestructure constant and the electron-to-proton mass ratio, as well as other new physics effects. Recent experimental advances in trapping and sympathetic cooling of highly charged ions will in the future enable advanced quantum logic techniques for controlling motional and internal degrees of freedom and thus enable high accuracy optical spectroscopy. Theoretical progress in calculating the properties of selected highly charged ions has allowed the evaluation of systematic shifts and the prediction of the sensitivity to the "new physics" effects. New theoretical challenges and opportunities emerge from relativistic, quantum electrodynamics, and nuclear size contributions that become comparable with interelectronic correlations. This article reviews the current status of theory and experiment in the field, addresses specific electronic configurations and systems which show the most promising properties for research, their potential limitations, and the techniques for their study.

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“…Представленные примеры демонстрируют, что значения ядерного множителя и поправки Бора-Вайскопфа сильно зависят от используемой ядерной модели [23,24].…”

Section: ядерный множительunclassified

Расчёт Сверхтонкой Магнитной Аномалии В Многоэлектронных Атомах

Коновалова¹,

Демидов²,

Козлов³

2020

Журнал Технической Физики

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The precision measurements of the ratio of hyperfine structure constants for $s_{1/2} $ and $ p_{1/2} $ states allow us to estimate the difference between hyperfine magnetic anomalies for these levels. We calculate the atomic factor in order to recover the absolute values of the hyperfine magnetic anomalies from their difference. Taking into account the hyperfine anomaly correction allows one to increase the accuracy of determining the $g$ factors of short-lived isotopes by more than an order of magnitude.

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The theory of the Bohr–Weisskopf effect in the hyperfine structure

Cited by 23 publications

References 30 publications

QED tests with highly charged ions

QED tests with highly charged ions

Highly charged ions: Optical clocks and applications in fundamental physics

Расчёт Сверхтонкой Магнитной Аномалии В Многоэлектронных Атомах

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