Calculation of atomic properties of superheavy elements 
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 and their ions

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

doi:10.1103/physreva.101.012514

Cited by 16 publications

(18 citation statements)

References 51 publications

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“…[67,68]). This works well for energy levels and transition amplitudes [69][70][71][72][73]. However, calculation of atomic characteristics, such as polarisabilities, EDM, etc., for which summation over complete set of intermediate states is needed, is problematic.…”

Section: Atoms With Open F -Shellmentioning

confidence: 98%

Electric dipole moments of atoms and molecules produced by enhanced nuclear Schiff moments

Flambaum

Dzuba

2020

Phys. Rev. A

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We perform calculations of the CP-violating atomic and molecular electric dipole moments (EDM) induced by the interaction of the nuclear Schiff moments with electrons. EDM of atoms Eu, Dy, Gd, Ac, Th, Pa, U, Np and Pu are of special interest since they have isotopes with strongly enhanced nuclear Schiff moments caused by the octupole nuclear deformation or soft octupole vibration mode.These atoms have open 4f or 5f shells making the calculations complicated. We use our special version of the configuration interaction method combined with the many-body perturbation theory method adopted for open f -shell case. To validate the method we perform similar calculations for simpler atoms (Xe, Hg, Tl + , Pb, Pb ++ , Rn, Ra) where some earlier results are available. In addition we present the estimates of the CP-violating nuclear spin -molecular axis interaction constants for molecules which may be of experimental interest including AcF, AcN, AcO + , EuN, EuO + , ThO, PbO and TlF. We also present updated values of the nuclear Schiff moments and atomic and molecular EDM expressed in terms of the CP-violating π-meson -nucleon interaction constantsḡ0, g1,ḡ2, QCD parameterθ and quark chromo-EDMs. The results may be used to test CP-violation theories and search for axion dark matter in atomic, molecular and solid state experiments.1 Nuclear EDM and magnetic quadrupole produced by the T,Podd nuclear forces are also enhanced due to an opposite parity level with the same spin close to the ground state [9,15]. Collective enhancement of the magnetic quadrupole moments in deformed nuclei have been demonstrated in [16].9 Some older molecular calculations presented constant X = W S /6. Table I to the energy shift W T,P = W S S J J · n gives for the fully polarised molecule the energy difference between the J z = J and J z = −J states: Substitution of the Schiff moment from

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Section: Atoms With Open F -Shellmentioning

confidence: 98%

Electric dipole moments of atoms and molecules produced by enhanced nuclear Schiff moments

Flambaum

Dzuba

2020

Phys. Rev. A

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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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“…Although all the results presented have been obtained within the framework of the singleconfiguration Dirac-Fock method, we also have studied the role of the configuration-interaction (CI) effects on the smearing out of the valence shell densities in Og atom. It is known that these effects can be very important in calculations of various properties of SHEs [14]. The CI-DF calculations of the electronic structure of Og show, however, that the CI weight of the ground configuration [Rn]5 f 14 6d 10 7s 2 7p 6 is about 94%.…”

Section: Pos(ffk2019)036mentioning

confidence: 99%