Investigations of odd-parity autoionization levels of atomic samarium using three-color resonance ionization spectroscopy

Mandal, Pijush Kanti; Mukherjee, Jaya; Dev, Vas; Shah, M.L.

doi:10.1016/j.jqsrt.2021.107944

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…In recent years, with the development of photoionization detection technology, substantial progress has been made in the spectral analysis of complex atomic systems. [4][5][6][7][8][9][10][11] However, from the National Institute of Standards and Technology (NIST) Atomic Spectra Database, there is no systematic experimental data for high-Z elements, especially lanthanides and actinides. [12] On the one hand, the high cost of sample preparation and high radioactivity bring much inconvenience in the experimental measurement.…”

Section: Introductionmentioning

confidence: 99%

Ridge regression energy levels calculation of neutral ytterbium (Z = 70)

Chen

Jiang

2023

Chinese Phys. B

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In view of the diffculty in calculating the atomic structure parameters of high-Z elements, the HFR (Hartree-Fock with relativistic corrections) theory in combination with the ridge regression (RR) algorithm rather than the Cowan code’s least squares fitting (LSF) method is proposed and applied. By analyzing the energy level structure parameters of the HFR theory and using the fitting experimental energy level extrapolation method, some excited state energy levels of the Yb I (Z = 70) atom including the 4f open shell are calculated. The advantages of the ridge regression algorithm are demonstrated by comparing it with Cowan code’s LSF results. In addition, the results obtained by the new method are compared with the experimental results and other theoretical results to demonstrate the reliability and accuracy of our approach.

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