Theoretical study of electronic structure of erbium and fermium

Allehabi, Saleh O.; Li, Ji‐Guang; Dzuba, V. A.; Flambaum, V. V.

doi:10.1016/j.jqsrt.2020.107137

Cited by 14 publications

(12 citation statements)

References 1 publication

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“…Note that, by including the experimental energy parameters in the theoretical calculations (compared with Ref. [61]), we obtain better agreement with the experimental data. The extracted lifetime is about a factor of 3 longer compared to the experimentally measured value.…”

Section: Theoretical Predictionssupporting

confidence: 57%

Observation of a narrow inner-shell orbital transition in atomic erbium at 1299 nm

Patscheider,

Yang,

Natale

et al. 2021

Preprint

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We report on the observation and coherent excitation of atoms on the narrow inner-shell orbital transition, connecting the erbium ground state [Xe]4f 12 ( 3 H6)6s 2 to the excited state [Xe]4f 11 ( 4 I15 /2 ) 0 5d( 5 D3 /2 )6s 2 ( 15 /2, 3 /2) 0 7 . This transition corresponds to a wavelength of 1299 nm and is optically closed. We perform high-resolution spectroscopy to extract the gJ -factor of the 1299-nm state and to determine the frequency shift for four bosonic isotopes. We further demonstrate coherent control of the atomic state and extract a lifetime of 178( 19) ms which corresponds to a linewidth of 0.9(1) Hz. The experimental findings are in good agreement with our semi-empirical model. In addition, we present theoretical calculations of the atomic polarizability, revealing several different magic-wavelength conditions. Finally, we make use of the vectorial polarizability and confirm a possible magic wavelength at 532 nm.

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Section: Theoretical Predictionssupporting

confidence: 57%

Observation of a narrow inner-shell orbital transition in atomic erbium at 1299 nm

Patscheider,

Yang,

Natale

et al. 2021

Preprint

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“…The CIPT method described above was used in a number of calculations for many-electron atoms (see, e.g., [16,17]) proving its usefulness. In present paper we go further applying similar approach to Equation (7).…”

Section: The Cipt Methodsmentioning

confidence: 99%

“…The arguments presented above show that the lanthanide-based optical clocks deserve further study. The electronic structure of Er was studied in our previous work [16] using the above mentioned CIPT method. This included energy levels, transition amplitudes, hyperfine structure and polarizability in the ground state.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Polarizabilities for Atoms with Open Shells

Dzuba

2020

Symmetry

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A version of the configuration interaction method for atoms with open shells (the Configuration Interaction with Perturbation Theory—CIPT method, PRA 95, 012503 (2017)) is extended for calculation of static and dynamic polarizabilities. Its use is demonstrated by calculation of the polarizabilities for the ground and excited states of Er, Tm and Yb. It is proved to be an useful tool in designing a new generation of optical atomic clocks sensitive to new physics.

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“…More recently, additional levels (orange) were reported for Ac [53,54], Th [55,56,57], Pa [58], U [59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75], Pu [53,75,76], Am [76,77], Es [78], Fm [40,79,80] and No [81,82]. In addition, theoretical predictions are shown (blue) for Ac [83], Fm [84,78], Md [85], No [86,87,88,89,90,91,92] and Lr [93,94,88] In general, the atomic structure of most actinide elements is only partially known due to the scarcity of isolated material and the lack of abundant isotopes with suitable half-lives.…”

Section: Atomic Structure Of the Heaviest Elementsmentioning

confidence: 98%

“…Calculations of atomic transitions of heavy elements including isotope shifts were performed in an astrophysical context to enable the search for atomic transitions in star light to determine the elemental abundances [104]. Progress in the theoretical treatment of open shells enables now calculation of elements with partly filled 5f shells such as Fm [84], Md [85] and for elements with open d-shells [105,106]. At present, calculations for most elements are existing [107,108,109,83,89,110,111,112,113,114] with some special emphasis on Og [115,116],…”

Section: Atomic Structure Of the Heaviest Elementsmentioning

confidence: 99%

Recent progress in laser spectroscopy of the actinides

Block,

Laatiaoui,

Raeder

2020

Preprint

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The interest to perform laser spectroscopy in the heaviest elements arises from the strong impact of relativistic effects, electron correlations and quantum electrodynamics on their atomic structure. Once this atomic structure is well understood, laser spectroscopy also provides access to nuclear properties such as spins, mean square charge radii and electromagnetic moments in a nuclear-model independent way. This is of particular interest for the heaviest actinides around N = 152, a region of shell-stabilized deformed nuclei. The experimental progress of laser spectroscopy in this region benefitted from continuous methodological and technical developments such as the introduction of buffer-gas-stopping techniques that enabled the access to ever more exotic nuclei far-off stability. The key challenges faced in this endeavor are small yields, nuclides with rather short half-lives and the need to search for atomic transitions in a wide spectral range guided by theoretical predictions. This paper describes the basics of the most common experimental methods and discusses selected recent results on the atomic and nuclear properties of the actinides up to nobelium where pioneering experiments were performed at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany.

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Theoretical study of electronic structure of erbium and fermium

Cited by 14 publications

References 1 publication

Observation of a narrow inner-shell orbital transition in atomic erbium at 1299 nm

Observation of a narrow inner-shell orbital transition in atomic erbium at 1299 nm

Calculation of Polarizabilities for Atoms with Open Shells

Recent progress in laser spectroscopy of the actinides

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