Two-region model of CH4, CO, CO2, and H2O formation in graphite due to simultaneous irradiation by O+ and H+
Bibliographic record
Abstract
Based on our experimental studies of the simultaneous O+ and H+ irradiation of graphite, symbolically represented as the O+-H+→C reaction system, we have developed a semiempirical kinetic model for describing the reactions leading to the formation of the reaction products CH4, CO, CO2, and H2O. The model builds on previously proposed concepts for methane formation via intermediate precursor generation and a “two-region” description of the graphite microstructure. These concepts have been extended to include intermediate precursor-containing steps for the formation of CO, CO2, and H2O, and the breakup of CH4 by the incident ions. Model predictions of the flux and energy dependence of the CH4, CO, and CO2 yields were generally in good agreement with experimental results for the H+→C and O+→C reactions. For the O+-H+→C reaction, the model agrees quite well with the flux ratio dependence of the H2O yield and the corresponding reductions in the CO, CO2, and CH4 yields.
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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".