Optical properties and photo‐ and X‐ray luminescence of Sm<sup>3+</sup>‐doped chalcogenides
Bibliographic record
Abstract
Abstract We report a new X‐ray scintillating phosphor material whose composition is based on Sm‐doped chalcogenides. These are partly crystallized glass ceramics prepared by melt quenching techniques. Optical characterization of the samples was carried out at room temperature. The photoluminescence emission spectra of Ga‐Ge‐S glasses (GGS) and Ba‐Ga‐Se (BGS) glasses and glass ceramics exited at 405 nm have been obtained. Photoluminescence emissions at 565, 600, and 650 nm bands were identified and attributed to transitions from 4G5/2 to 6H5/2,6H7/2, and 6H9/2 respectively in Sm3+. The PL intensity from BGS material is stronger than that from GGS glasses doped with Sm3+. The X‐ray luminescence (XL) could be detected from the BGS glass ceramic samples under an excitation from a Cu target X‐ray tube (40kV, 200 mA power). The red light XL was clearly visible in the dark (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".