High-Resolution Luminescence and Absorption Spectroscopy of Cs<sub>2</sub>GeF<sub>6</sub>:Os<sup>4+</sup>
Bibliographic record
Abstract
The luminescence spectrum of the Os4+ dopant ion occupying O(h) sites of the Cs2GeF6 host shows three sets of resolved transitions in the near-infrared at approximately 12000, 9000, and 6700 cm(-1), corresponding to intraconfigurational transitions between the 1T2g lowest excited electronic state and the Gamma1, Gamma4, and Gamma5/Gamma3 spinor levels of the 3T1g ground state, respectively. The octahedral OsF6(2-) chromophore does not emit from higher excited states, in contrast to related chloride and bromide host lattices, where several excited states show luminescence. The highly resolved single-crystal luminescence and absorption spectra are rationalized with ligand field parameters 10 Dq = 24570 cm(-1), B = 500 cm(-1), C = 2380 cm(-1), zeta = 3000 cm(-1). Transition intensities reveal an intermediate coupling situation for OsF6(2-): Whereas they generally follow the selection rules derived in the L-S coupling scheme, additional information can be gained from the j-j coupling limit. The resolved vibronic structure allows the identification of the most efficient ungerade parity enabling modes (vibronic origins) and shows that progressions along the a1g, e(g), and t2g modes occur for some transitions.
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How this classification was reachedexpand
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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".