Assessment of reflective separator films for small crystal arrays
Bibliographic record
Abstract
Thin, highly reflective, opaque separators are required to assemble compact arrays of small discrete scintillation crystals used in conjunction with photodiode array readouts in high-resolution imaging applications. Mechanical stability, individual detector performance, and ease of handling for wrapping crystals are the main factors to be considered in the choice of a suitable separator. Three different types of reflective materials were tested with 4/spl times/4 arrays of LSO, BGO and GSO: Tyvek 1058D paper, Toray Lumirror E60L Polyester Film, and 3M VM2000 Radiant Light Film. The light output and intrinsic energy resolution of individual crystals were measured as a function of their position in the arrays and the results were compared to simulation of light collection efficiency obtained with DETECT97. Optical crosstalk between adjacent and diagonal pixels was evaluated. The Lumirror film consistently yielded superior results with BGO. With LSO and GSO, the 3M reflector was found to provide slightly better light output and energy resolution. Despite the sharp cutoff in spectral reflectivity at 400 nm with this reflector, the crosstalk between adjacent LSO crystals was not found to be significant.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.001 | 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 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".