ESR study of samarium doped fluorophosphate glasses for high-dose, high-resolution dosimetry
Why this work is in the frame
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Bibliographic record
Abstract
We have studied the effect of samarium doping concentration and thermal annealing on X-ray induced defect centers, including phosphorus-oxygen hole and electron centers (POHC and POEC), in Sm3+-doped fluorophosphate glasses towards developing a potential high-dose, high-resolution detector for microbeam radiation therapy. ESR measurements show that defect center formation is suppressed by increasing the Sm-dopant concentration with POECs more strongly influenced than POHCs. This can be explained by a model based on the competition between defect center formations and Sm3+ ⇆ Sm2+ interconversion. Thermal annealing at increasing moderate temperatures (TA = 100−300 °C) reduces the POHC related ESR and induced absorbance bands while those of POEC continue to survive. ESR measurements over a wider range show the trace of a very broad ESR signal in samples containing Sm2+ ions including those annealed at temperatures between 350 °C and glass transition temperature (Tg ≈ 460 °C). Finally, thermal annealing at 550 °C (> Tg) totally erases all the ESR signals and restores the sample to its original unirradiated state.
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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 | 0.001 |
| 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 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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