Stringent tests of QED using highly charged ions

Shabaev, V. M.; Bondarev, A. I.; Glazov, D. A.; Kaygorodov, M. Y.; Kozhedub, Y. S.; Maltsev, I. A.; Malyshev, A. V.; Popov, R. V.; Tupitsyn, I. I.; Zubova, N. A.

doi:10.1007/s10751-018-1537-8

Cited by 33 publications

(20 citation statements)

References 58 publications

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“…For transition energies, the present experimental accuracy reaches the order of 10 −6 − 10 −18 [1][2][3]. For this case the interplay between experiment and theory has improved drastically our understanding of different effects, e.g., the Breit interaction, finite nuclear mass, and quantum electrodynamics (QED) effects [4,5]. This interplay also has great potential in the search for new physics [6].…”

Section: Introductionmentioning

confidence: 89%

High-precision calculations of the $1s^{2} 2s 2p$ $^1P_{1} \to 1s^{2} 2s^{2}$ $^1S_{0}$ spin-allowed $E1$ transition in C {\small III}

Bilal,

Volotka,

Beerwerth

et al. 2019

Preprint

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Large-scale relativistic calculations are performed for the transition energy and line strength of the 1s 2 2s2p 1 P1 − 1s 2 2s 2 1 S0 transition in Be-like carbon. Based on the multiconfiguration Dirac-Hartree-Fock (MCDHF) approach, different correlation models are developed to account for all major electron-electron correlation contributions. These correlation models are tested with various sets of the initial and the final state wave functions. The uncertainty of the predicted line strength due to missing correlation effects is estimated from the differences between the results obtained with those models. The finite nuclear mass effect is accurately calculated taking into account the energy, wave functions as well as operator contributions. As a result, a reliable theoretical benchmark of the E1 line strength is provided to support high precision lifetime measurement of the 1s 2 2s2p 1 P1 state in Be-like carbon.

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Section: Introductionmentioning

confidence: 89%

High-precision calculations of the $1s^{2} 2s 2p$ $^1P_{1} \to 1s^{2} 2s^{2}$ $^1S_{0}$ spin-allowed $E1$ transition in C {\small III}

Bilal,

Volotka,

Beerwerth

et al. 2019

Preprint

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“…Многозарядные ионы являются универсальным инструментом для проверки Стандартной модели, поиска новой физики, определения фундаментальных констант и ядерных параметров [1][2][3][4]. В частности, ядерные магнитные моменты находятся в центре внимания в настоящее время, поскольку погрешность их определения из наиболее распространённого метода ядерного магнитного резонанса может оказаться значительно больше, чем принято считать [5,6].…”

Section: Introductionunclassified

Ядерное Магнитное Экранирование В Многозарядных Ионах

Volchkova¹,

Glazov²,

Shabaev³

2021

Оптика И Спектроскопия

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The nuclear magnetic shielding is considered within the fully relativistic approach for the ground state of H-, Li-, and B-like ions in the range Z=32-92. The interelectronic interaction is evaluated to the first order of the perturbation theory in Li- and B-like ions. The calculations are based on the finite-field method. The numerical solution of the Dirac equation with the magnetic-field and hyperfine interactions included within the dual-kinetic-balance method is employed. The nuclear magnetic shielding constant is an important ingredient for accurate determination of the nuclear magnetic moments from the high-precision g-factor measurements.

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“…For middle-and high-Z few-electron ions, the PT calculations start with the Dirac equation for an electron moving in the Coulomb field of the nucleus and include the QED corrections up to the first or second order in the parameter 1/Z (see, e.g., Refs. [1,2] and references therein). The same method can also be applied for many-electron atoms, provided the PT starts with an effective potential, which partially takes into account the electron-electron interaction effects [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

QED corrections to the $^2P_{1/2}-{}^2P_{3/2}$ fine structure in fluorinelike ions: model Lamb shift operator approach

Shabaev,

Tupitsyn,

Kaygorodov

et al. 2020

Preprint

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In [Li et al., Phys. Rev. A 98, 020502(R) (2018)] it was claimed that the model-potential computations of the Lamb shift on the 2 P 1/2 − 2 P 3/2 fine structure in fluorinelike uranium lead to a discrepancy between theory and experiment. Later, it was reported by [Volotka et al., Phys. Rev. A 100, 010502(R) (2019)] that ab initio QED calculation, including the first-order one-electron QED contributions and the related effects of two-electron screening, yields the result which restores the agreement between theory and experiment and strongly disagrees with the model-potential Lamb shift values. In the present paper, the model Lamb shift operator [Shabaev et al., Phys. Rev. A 88, 012513 (2013)] is used to evaluate the QED effects on the 2 P 1/2 − 2 P 3/2 fine structure in Flike ions. The calculations are performed by incorporating this operator into the Dirac-Coulomb-Breit equation employing different methods. It is demonstrated that the methods, based on including the Lamb shift operator either into the Dirac-Fock equations or into the calculations by perturbation theory, lead to the theoretical results which are in good agreement with each other and with experiment. The restriction of these results to the first order in the QED effects leads to a value which agrees with the aforementioned ab initio QED result.

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Stringent tests of QED using highly charged ions

Cited by 33 publications

References 58 publications

High-precision calculations of the $1s^{2} 2s 2p$ $^1P_{1} \to 1s^{2} 2s^{2}$ $^1S_{0}$ spin-allowed $E1$ transition in C {\small III}

High-precision calculations of the $1s^{2} 2s 2p$ $^1P_{1} \to 1s^{2} 2s^{2}$ $^1S_{0}$ spin-allowed $E1$ transition in C {\small III}

Ядерное Магнитное Экранирование В Многозарядных Ионах

QED corrections to the $^2P_{1/2}-{}^2P_{3/2}$ fine structure in fluorinelike ions: model Lamb shift operator approach

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