Experimental determination of the electron density of liquid H<sub>2</sub>O and D<sub>2</sub>O
Why this work is in the frame
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Bibliographic record
Abstract
X-diffraction experiments on liquids are most commonly analysed within the independent atom approximation (IAA), despite the fact that compounds of light elements may show deviations from this simple approximation. An analysis of high energy x-ray diffraction data on liquid water in terms of the electron density auto-correlation function is given. The analysis shows that some but not all deviations from the IAA can be accounted for by a charged atom model. This corroborates findings from Compton scattering experiments on solid water that the nature of hydrogen bonding is at least partly covalent. The electron densities in H2O and D2O are found to be indistinguishable within the limits of the present experiments. This is in agreement with the interpretation of the differences in the intermolecular structure of H2O and D2O as being quantum mechanical in origin, and not the effect of a differing interaction potential.
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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 it