Multiple ionization and complete fragmentation of OCS by impact with highly charged ions Ar<sup>4+</sup>and Ar<sup>8+</sup>at 15 keV q<sup>−1</sup>
Bibliographic record
Abstract
We have used time- and position-sensitive detection in a coincidence arrangement to study the multiple ionization of OCS in collisions with Ar4+ and Ar8+ at 15 keV q−1 followed by complete breakup of the molecule OCS—Oa++ Cb+ + Sc+. We have compared our results with theoretical values derived by simulating the breakup, from ground state distributions of bond lengths and bond angle assuming a point-like ion and purely Coulombic potential. This comparison shows that in general the experimental distributions of energy release are broader and peak at lower energy than calculated. Better agreement between measurement and calculation is however found with increasing the final charge state. Furthermore, the amount of induced bending is considerably less for the high charge states. However, even where total energy release is close to Coulombic (6+) individual fragment ion energy distributions differ from the expected values because of the degree of bending. Using Newton and Dalitz plots, we are able to identify the extent of concerted and stepwise processes. Our results indicate a higher degree of asymmetric bond processes at a low charge state (3+) where small amounts (<7%) of the stepwise processes are also measurable.
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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) | 0.001 | 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 | 0.001 |
| 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".