Development of A Multi-Layer Silicon Betaray Spectrometer for CANDU Environment and Preliminary Characterization
Bibliographic record
Abstract
To echo the growing demand of precise assessment dose to lens of eye from beta radiation at Canada Deuterium Uranium (CANDU) power planet, we present a silicon-based beta-ray spectrometer that is able to measure the in situ beta-ray fluence spectrum and real-time dose monitor with a high gamma rejection ratio avoiding overestimation of beta dose in the beta-gamma mix environment at CANDU sites. A prototype has been developed that features one 500 $\mu \mathrm{m}$ and three $1500 \mu \mathrm{m}$ silicon detectors in series to measure a beta energy range of 70 keV to 3000 keV using the $\Delta \mathrm{E}$ vs. E method, which enables temporal coincidence and energy logic for electron channel binning. GEANT4 simulation was extensively conducted for the geometric factors and instrument response functions to facilitate the instrument design and characterization. The silicon beta spectrometer prototype was characterized under a beta-gamma mixed field consisting of ${ }^{90} \mathrm{Sr}$ and ${ }^{137} \mathrm{Cs}$ sources to evaluate the beta/gamma discrimination ability. In this paper, we report the project motivation, hardware description, GEANT4 modeling and preliminary characterization of the prototype system.
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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) | 0.000 | 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) | 0.000 | 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".