Hyperfine quenching: review of experiment and theory<sup>1</sup>This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.

Johnson, W. R.

doi:10.1139/p11-018

Cited by 32 publications

(31 citation statements)

References 54 publications

(117 reference statements)

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“…While the accurate evaluation of the electronic amplitude requires detailed atomic structure calculations, as discussed in Refs. [39][40][41][42][43], the nuclear term is determined geometrically by: (14) where µ I is the nuclear magnetic dipole moment.…”

Section: (N)mentioning

confidence: 99%

Hyperfine-induced effects on the linear polarization ofKα1emission from heliumlike ions

et al. 2013

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The linear polarization of the characteristic photon emission from few-electron ions is studied for its sensitivity with regard to the nuclear spin and magnetic moment of the ions. Special attention is paid, in particular, to the Kα1 (1s2p 3/2 1,3 P1,2 → 1s 2 1 S0) decay of selected helium-like ions following the radiative electron capture into initially hydrogen-like species. Based on the density matrix theory, a unified description is developed that includes both, the many-electron and hyperfine interactions as well as the multipole-mixing effects arising from the expansion of the radiation field. It is shown that the polarization of the Kα1 line can be significantly affected by the mutipole mixing between the leading M 2 and hyperfine-induced E1 components of 1s2p 3 P2, Fi → 1s 2 1 S0, F f transitions. This E1-M 2 mixing strongly depends on the nuclear properties of the considered isotopes and can be addressed experimentally at existing heavy-ion storage rings.

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Section: (N)mentioning

confidence: 99%

Hyperfine-induced effects on the linear polarization ofKα1emission from heliumlike ions

et al. 2013

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“…The detailed expressions with the angular reduction can be found in Ref. [26,27] and in the Appendix. The corresponding rate for the E1 transition (we use atomic units) is:…”

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confidence: 99%

Hyperfine-induced electric dipole contributions to the electric octupole and magnetic quadrupole atomic clock transitions

Dzuba

Flambaum

2016

Phys. Rev. A

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Hyperfine-induced electric dipole contributions may significantly increase probabilities of otherwise very weak electric octupole and magnetic quadrupole atomic clock transitions (e.g. transitions between s and f electron orbitals). These transitions can be used for exceptionally accurate atomic clocks, quantum information processing and search for dark matter. They are very sensitive to new physics beyond the Standard Model, such as temporal variation of the fine structure constant, the Lorentz invariance and Einstein equivalence principle violation. We formulate conditions under which the hyperfine-induced electric dipole contribution dominates. Due to the hyperfine quenching the electric octupole clock transition in 173 Yb + is two orders of magnitude stronger than that in currently used 171 Electric octupole (E3) and magnetic quadrupole (M2) atomic optical transitions, which correspond to transitions between s and f electron orbitals, can be used as optical clocks of exceptionally high accuracy [1][2][3][4][5]. They also present unique opportunities for fundamental research by being sensitive to new physics beyond the Standard Model. The transitions are very sensitive to the temporal variation of the fine structure constant α (α = e 2 /hc) [2][3][4][5][6][7][8][9][10], to the local Lorentz invariance (LLI) violation [11], the effect of dark matter [12][13][14][15][16][17][18], etc. For example, the 4f 14 6s 2 S 1/2 − 4f 13 6s 2 2 F o 7/2 transition in Yb + offers opportunities for frequency measurements with fractional accuracy ∼ 10 −18 [1]. The work is in progress in many laboratories [19][20][21]. Measuring the ratio of frequency of this transition to the frequency of the 4f 14 6s 2 S 1/2 − 4f 14 5d 2 D 3/2 transition in the same ion put the strongest limit on the temporal variation of the fine structure constant and (by including the Cs hyperfine transition) on the proton-to-electron mass ratio [8,9,[22][23][24]. The use of the electric octupole transition in Yb + for the search of LLI violation may lead to five orders of magnitude improvement over current best bounds on the LLI violation in the electron-photon sector [11].Many similar opportunities come with the use of optical transitions in highly-charged ions (HCI) [2][3][4][5]10]. For example, the spectrum of the Ir 17+ ion has been recently measured [25] with the prospect of using the 4f 13 5s 3 F o 4 − 4f 12 5s 2 3 H 6 transition for the time keeping and fundamental research.Electrical octupole and magnetic quadrupole transitions are very weak, typical linewidth can be as small as few nHz. This may lead to certain difficulties in the measurements. In this paper we demonstrate that the electric dipole transition (E1) induced by hyperfine interaction can be significantly larger than the electric octupole or magnetic quadrupole transitions. Therefore, choosing right isotope might be important for the measurements.At least one or more of the following conditions is needed for the domination of the hyperfine-induced E1 transitions.• The hyperfine mixin...

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“…There are a wide range of calculations for hyperfineinduced transitions (HIT) [3,12,[14][15][16]19,20,39,42] and magnetic-field-induced transitions for isotopes without nuclear spin (MIT-fs) [2,6,8]. Here, we focus on discussing the magnetic-field-and hyperfine-induced (MIT-hfs) transitions for isotopes with nuclear spin.…”

Section: Induced Transitionsmentioning

confidence: 99%

Magnetic-field- and hyperfine-induced P03−S01 transitions in Be- and Ne-like ions

Jönsson

Brage

et al. 2017

Phys. Rev. A

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In this work, we investigate the magnetic-field-and hyperfine-induced 3 P 0 → 1 S 0 transitions in Be-and Ne-like ions along the respective isoelectronic sequence by using the multiconfiguration Dirac-Hartree-Fock method. The transition probabilities are in this case dependent on the magnetic hyperfine quantum number M F of the upper state. We show that it is important to include perturbers with F = ±1. The calculated transition rates are compared to experimental results, when available. The discrepancies between the resulting magnetic-fieldand hyperfine-induced transition rates and the experimental values in Be-like ions are discussed as well as the observability of the hyperfine-induced transitions in Ne-like ions.

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Hyperfine quenching: review of experiment and theory¹This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.

Abstract: We give a brief outline of the theory of hyperfine quenching followed by a review of the progress that has been made in both theory and experiment since the pioneering work of Garstang (J. Opt. Soc. Am. 52, 845 (1962)).

Cited by 32 publications

References 54 publications

Hyperfine-induced effects on the linear polarization ofKα1emission from heliumlike ions

Hyperfine-induced effects on the linear polarization ofKα1emission from heliumlike ions

Hyperfine-induced electric dipole contributions to the electric octupole and magnetic quadrupole atomic clock transitions

Magnetic-field- and hyperfine-induced P03−S01 transitions in Be- and Ne-like ions

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Hyperfine quenching: review of experiment and theory1This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.

Abstract: We give a brief outline of the theory of hyperfine quenching followed by a review of the progress that has been made in both theory and experiment since the pioneering work of Garstang (J. Opt. Soc. Am. 52, 845 (1962)).

Cited by 32 publications

References 54 publications

Hyperfine-induced effects on the linear polarization ofKα1emission from heliumlike ions

Hyperfine-induced effects on the linear polarization ofKα1emission from heliumlike ions

Hyperfine-induced electric dipole contributions to the electric octupole and magnetic quadrupole atomic clock transitions

Magnetic-field- and hyperfine-induced P03−S01 transitions in Be- and Ne-like ions

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Hyperfine quenching: review of experiment and theory¹This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.