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- W4387267255 abstract "We present a modified version of the Judd-Ofelt theory, which describes the intensities of f-f transitions for trivalent lanthanide ions (Ln3+) in solids. In our model, the properties of the dopant are calculated with well-established atomic-structure techniques, while the influence of the crystal-field potential is described as a perturbation, by three adjustable parameters. Compared to our previous work [G. Hovhannesyan et al., J. Lumin. 241, 118456 (2022)], the spin-orbit interaction within the first excited configuration 4fw−15d is described in a perturbative way, whereas it is exactly taken into account in the ground configuration 4fw, using all the eigenvector components of the free-ion levels. Moreover, the wavelength-dependence of the refractive index of the host material is also accounted for. We test the validity of our model on three ions: Eu3+, Nd3+ and Er3+. The results of the extension are satisfactory, we are able to give a physical insight into all the transitions within the ground electronic configuration, and also to reproduce quantitatively experimental absorption oscillator strengths. We also performed calculations of standard JO parameters, and the results are in good agreement with the values reported in the literature. The code used to make the calculations is available on GitLab." @default.
- W4387267255 created "2023-10-03" @default.
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- W4387267255 date "2023-10-01" @default.
- W4387267255 modified "2023-10-17" @default.
- W4387267255 title "Extension of Judd-Ofelt theory: Application on Eu3+, Nd3+ and Er3+" @default.
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- W4387267255 doi "https://doi.org/10.1016/j.jlumin.2023.120234" @default.
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