Theoretical study of the electron structure of superheavy elements with an open 
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 shell: Sg, Bh, Hs, and Mt

Lackenby, B. G. C.; Dzuba, V. A.; Flambaum, V. V.

doi:10.1103/physreva.99.042509

Cited by 12 publications

(11 citation statements)

References 64 publications

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“…This implementation allows systems with a large number of valence electrons to be calculated accurately with reasonable computational resources. Other CI methods for large valence systems have also proved successful [59,60].…”

Section: Methods For Calculationmentioning

confidence: 99%

Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center

Hees

Roberts

et al. 2020

Phys. Rev. Lett.

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Searching for space-time variations of the constants of Nature is a promising way to search for new physics beyond General Relativity and the standard model motivated by unification theories and models of dark matter and dark energy. We propose a new way to search for a variation of the fine-structure constant using measurements of late-type evolved giant stars from the S-star cluster orbiting the supermassive black hole in our Galactic Center. A measurement of the difference between distinct absorption lines (with different sensitivity to the fine structure constant) from a star leads to a direct estimate of a variation of the fine structure constant between the star's location and Earth. Using spectroscopic measurements of 5 stars, we obtain a constraint on the relative variation of the fine structure constant below 10 −5 . This is the first time a varying constant of Nature is searched for around a black hole and in a high gravitational potential. This analysis shows new ways the monitoring of stars in the Galactic Center can be used to probe fundamental physics.

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Section: Methods For Calculationmentioning

confidence: 99%

Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center

Hees

Roberts

et al. 2020

Phys. Rev. Lett.

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“…As mentioned above, a novel configuration interaction approach to calculate the spectra of atoms with unfilled shells has been developed [9] and used to calculate the spectra, IPs and transition probabilities in SHEs Z = 102, 105 − 109 and Z = 118 and their respective lighter elemental analogs [9][10][11][12]. Recently the efficiency of this method has been improved upon with only a small additional cost of accuracy [23].…”

Section: The Cipt Methodsmentioning

confidence: 99%

“…This is similar to what was found when comparing the lighter open 6d−shell elements to their respectively lighter analogs in Refs. [10,11]. The electric dipole (E1) amplitudes and transition rates of these optically accessible states are calculate in Section V.…”

Section: Ds and Rgmentioning

confidence: 99%

“…The CIPT method has been used for the open 6d−shell SHEs Db (Z = 105) [10], Sg (Z = 106), Bh(Z = 107), Hs(Z = 108) and Mt(Z = 109) [11] along with the closed shell noble SHE Og (Z = 118) [12]. This method has also been used to accurately calculate the low-lying states of Ta [10] and Rn [12] (lighter elemental analogs of Db and Og respectively) when compared to available experimental data.…”

Section: Introductionmentioning

confidence: 99%

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Calculation of atomic properties of superheavy elements Z=110–112 and their ions

2020

Self Cite

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We calculate the spectra, electric dipole transition rates and isotope shifts of the super heavy elements Ds (Z = 110), Rg (Z = 111) and Cn (Z = 112) and their ions. These calculations were performed using a recently developed, efficient version of the ab intio configuration interaction combined with perturbation theory to treat distant effects. The successive ionization potentials of the three elements are also calculated and compared to lighter elements.

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“…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 the electron structure of superheavy elements with an open 6d shell: Sg, Bh, Hs, and Mt

Cited by 12 publications

References 64 publications

Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center

Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center

Calculation of atomic properties of superheavy elements Z=110–112 and their ions

Recent progress in laser spectroscopy of the actinides

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