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Atomic determination of the nuclear quadrupole moment Q(209Bi) using the multi-configuration Dirac–Hartree–Fock method.

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Title: Atomic determination of the nuclear quadrupole moment Q(209Bi) using the multi-configuration Dirac–Hartree–Fock method.
Authors: Li, Jiguang1 (AUTHOR) li_jiguang@iapcm.ac.cn, Bieroń, Jacek2 (AUTHOR), Godefroid, Michel3 (AUTHOR), Jönsson, Per4 (AUTHOR)
Source: European Physical Journal D (EPJ D). Dec2025, Vol. 79 Issue 12, p1-8. 8p.
Subjects: Quadrupole moments, Hyperfine interactions, Quantum chemistry, Electromagnetism, Isotopes, Computational physics, Electron configuration
Abstract: The multi-configuration Dirac–Hartree–Fock method implemented in the Grasp2018 package was employed to calculate the magnetic dipole hyperfine interaction constants and electric field gradients of levels in the ground configuration of the neutral bismuth atom. Combining the calculated electric field gradient of the ground state with the measured electric quadrupole hyperfine interaction constant, we extracted the nuclear quadrupole moment for the 209 Bi isotope, Q (209 Bi) = - 422 (22) mb. A "world average" value of the nuclear quadrupole moment of this isotope, Q (209 Bi) = - 420 (17) mb, was deduced from the present result combined with a large sample of other theoretical values obtained with elaborate atomic- and molecular-structure calculations. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal D (EPJ D) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 190958553
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  Data: Atomic determination of the nuclear quadrupole moment Q(209Bi) using the multi-configuration Dirac–Hartree–Fock method.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Jiguang%22">Li, Jiguang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> li_jiguang@iapcm.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Bieroń%2C+Jacek%22">Bieroń, Jacek</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Godefroid%2C+Michel%22">Godefroid, Michel</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jönsson%2C+Per%22">Jönsson, Per</searchLink><relatesTo>4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+D+%28EPJ+D%29%22">European Physical Journal D (EPJ D)</searchLink>. Dec2025, Vol. 79 Issue 12, p1-8. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Quadrupole+moments%22">Quadrupole moments</searchLink><br /><searchLink fieldCode="DE" term="%22Hyperfine+interactions%22">Hyperfine interactions</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+chemistry%22">Quantum chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetism%22">Electromagnetism</searchLink><br /><searchLink fieldCode="DE" term="%22Isotopes%22">Isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+physics%22">Computational physics</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+configuration%22">Electron configuration</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The multi-configuration Dirac–Hartree–Fock method implemented in the Grasp2018 package was employed to calculate the magnetic dipole hyperfine interaction constants and electric field gradients of levels in the ground configuration of the neutral bismuth atom. Combining the calculated electric field gradient of the ground state with the measured electric quadrupole hyperfine interaction constant, we extracted the nuclear quadrupole moment for the 209 Bi isotope, Q (209 Bi) = - 422 (22) mb. A "world average" value of the nuclear quadrupole moment of this isotope, Q (209 Bi) = - 420 (17) mb, was deduced from the present result combined with a large sample of other theoretical values obtained with elaborate atomic- and molecular-structure calculations. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Physical Journal D (EPJ D) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1140/epjd/s10053-025-01105-8
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      – Code: eng
        Text: English
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        PageCount: 8
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      – SubjectFull: Quadrupole moments
        Type: general
      – SubjectFull: Hyperfine interactions
        Type: general
      – SubjectFull: Quantum chemistry
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      – SubjectFull: Electromagnetism
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      – SubjectFull: Isotopes
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      – SubjectFull: Electron configuration
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      – TitleFull: Atomic determination of the nuclear quadrupole moment Q(209Bi) using the multi-configuration Dirac–Hartree–Fock method.
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            – D: 01
              M: 12
              Text: Dec2025
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              Y: 2025
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