Influence of high fluence neutron irradiation on forward current of semiconductor detectors
Bibliographic record
Abstract
Forward current-voltage (I-V) characteristics of non-irradiated and irradiated p/sup +/-n-n/sup +/ detectors, at neutron fluences (/spl phi/) up to 10/sup 14/ n/cm/sup 2/, were measured and the obtained data were analyzed. The I/sub f/-V/sub f/ characteristics confirmed the existence of a critical fluences (/spl phi//sub c/>5/spl times/10/sup 11/ n/cm/sup 2/), where abrupt changes in the dependence of forward current on voltage appear. We found that at /spl phi/>/spl phi//sub c/ a similar abrupt drop of the rectification ratio (Rec) appears, but a large reverse voltage could, nevertheless, be applied. The series resistivity (/spl rho/), calculated from the I/sub f/-V/sub f/ characteristics, for both non-irradiated (NI) and irradiated detectors, shows that for NI detectors the resistivity is of the same order of magnitude like that of the silicon bulk (1200 /spl Omega/ cm). The resistivity (/spl rho/) for irradiated devices increases (with increasing values of /spl phi/, of up to 10/sup 14/ n/cm/sup 2/), up to about 4/spl times/10/sup 3/ /spl Omega/ cm. As a result of the increase of /spl rho/ with /spl phi/, the initial p/sup +/-n-n/sup +/ diode becomes a p/sup +/-/spl nu/-n/sup +/ device. This study explains the rather good charge collection efficiency in spite of strongly affected physical properties.
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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".