Experimental and semi-empirical studies of the fine and the hyperfine structure of even-parity configuration system of atomic lutetium

Marcin Klempka; Magdalena Elantkowska; Bogusław Furmann; Jarosław Ruczkowski; Przemysław Głowacki; Szymon Mieloch; Danuta Stefańska

doi:10.1016/j.jqsrt.2025.109755

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Title

Experimental and semi-empirical studies of the fine and the hyperfine structure of even-parity configuration system of atomic lutetium

Authors

Marcin Klempka (WIMiFT) ^{[ 1 ][ 2.8 ][ P ]}
Magdalena Elantkowska (WIMiFT) ^{[ 2 ][ 2.8 ][ P ]}
Bogusław Furmann (WIMiFT) ^{[ 2 ][ 2.8 ][ P ]}
Jarosław Ruczkowski (WARiE) ^{[ 3 ][ 2.10 ][ P ]}
Przemysław Głowacki (WIMiFT) ^{[ 2 ][ 2.8 ][ P ]}
Szymon Mieloch (WIMiFT) ^{[ 1 ][ 2.8 ][ SzD ]}
Danuta Stefańska (WIMiFT) ^{[ 2 ][ 2.8 ][ P ]}

^{[ 1 ]} Wydział Inżynierii Materiałowej i Fizyki Technicznej, Politechnika Poznańska | ^{[ 2 ]} Instytut Badań Materiałowych i Inżynierii Kwantowej, Wydział Inżynierii Materiałowej i Fizyki Technicznej, Politechnika Poznańska | ^{[ 3 ]} Instytut Robotyki i Inteligencji Maszynowej, Wydział Automatyki, Robotyki i Elektrotechniki, Politechnika Poznańska | ^{[ P ]} employee | ^{[ SzD ]} doctoral school student

Scientific discipline (Law 2.0)

[2.8] Materials engineering
[2.10] Environmental engineering, mining and energy

Year of publication

2026

Published in

Journal of Quantitative Spectroscopy and Radiative Transfer

Journal year: 2026 | Journal volume: vol. 350

Article type

scientific article

Publication language

english

Keywords

EN

atomic structure
hyperfine structure
lutetium

Abstract

EN The paper presents the results of the fine structure (fs) and the hyperfine structure (hfs) analysis of even-parity configuration levels of neutral lutetium (Lu I). The experimental results, obtained within this study using laserinduced fluorescence (LIF) spectroscopy or Fourier transform spectra, led to determination of the hfs constants for 17 levels, 5 of them evaluated for the first time. Using these new values, along with all the data available in the literature, we performed a semi-empirical parametric study of the fs and the hfs for the system of 147 even-parity configurations. A mean error of 𝛥𝐸 = 5.7 cm−1 for 174 energy levels was obtained. A very good consistency between the calculated and measured values was achieved for magnetic dipole constants (A); for electric quadrupole constants (B) the respective agreement was only slightly worse. For unknown electronic levels, predicted values of the level energies, Landé 𝑔𝐽 factors and the hfs constants are presented.

Date of online publication

18.11.2025

Pages (from - to)

109755-1 - 109755-17

DOI

10.1016/j.jqsrt.2025.109755

URL

https://www.sciencedirect.com/science/article/pii/S0022407325004170

Comments

Article number: 109755

Ministry points / journal

100

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