Variation of Fluorescence Lifetimes and Judd-Ofelt Parameters between Eu<sup>3+</sup> Doped Bulk and Nanocrystalline Cubic Lu<sub>2</sub>O<sub>3</sub>
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Bibliographic record
Abstract
The luminescent properties of 1 mol % Eu 3+ -doped cubic Lu 2 O 3 nanocrystals prepared by a combustion synthesis route were investigated. The visible emission spectrum of the europium doped Lu 2 O 3 nanocrystals indicate that the structural environment surrounding the dopant Eu 3+ ion is distorted when compared to a bulk sample with a micrometer particle size. From the resulting emission spectra, the Ω 2 and Ω 4 Judd-Ofelt intensity parameters were calculated. The lifetimes of the 5 D 0 excited state for both the C 2 and C 3i sites were found to be nearly double that found for a similarly doped sample with larger particle size (bulk sample). This behavior is attributed to a change in the refractive index of the nanocrystalline material that in turn modifies the oscillator strength of the 4f ↔ 4f transitions.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it