Phosphorescence spectra from alkali feldspars as they are cooled
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Bibliographic record
Abstract
We report here phosphorescence spectra over the range 1.55 to 5.5 eV from three alkali feldspars after irradiation as they are cooled from room temperature to 130 K. The dominant emission was at 1.7 eV. With decreasing temperature, the intensity of this band initially decreased, but then increased below 250 K, consistent with the observation of Visocekas and Zink. We confirm their inference that they were measuring the 1.7 eV emission band characteristic of Fe3+. Other emission bands were observed at 2.2, 2.7 and 4.3 eV; their intensities decreased with decreasing temperature.We were also able to measure the emission spectra of one sample after a 30 minute heating at 120°C; the 1.7 eV band was much reduced and the emission now dominated by the 2.2 eV band, characteristic of Mn2+. The 1.7 eV band now did not show thermal quenching.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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