Sub-7-femtosecond conical-intersection dynamics probed at the carbon K-edge
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Bibliographic record
Abstract
How fast is electronic relaxation? Technical advances in extending spectroscopy to the attosecond time scale has caused considerable interest in experimental studies of various ultrafast processes that were previously inaccessible. Using attosecond transient absorption around the carbon K-edge accompanied by ab initio quantum dynamics simulations, Zinchenko et al. investigated ultrafast, non-adiabatic dynamics in the ethylene cation. They directly observed the electronic D 1 → D 0 relaxation mediated by the conical intersection taking place within 7 femtoseconds, far shorter than any vibrational period or any previously reported electronic relaxation. The demonstrated technique is directly applicable to liquids and solutions, enabling further studies of charge- and energy-transfer dynamics of organic molecules in chemical and biochemical systems. Science , this issue p. 489
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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) | 0.001 | 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