Bibliographic record
Abstract
The infrared spectra of five distinct species of N2O–hydrogen van der Waals complexes (N2O–paraH2, –orthoH2, –orthoD2, –paraD2, and –HD) were studied in the region of the ν1 fundamental band of N2O (≈2224 cm−1) by tunable diode laser spectroscopy in a pulsed supersonic jet expansion. The spectra corresponded to those of T-shaped asymmetric rotors with mainly a-type transitions (ΔKa=0), plus weaker b-type transitions (ΔKa=±1) in the case of N2O–D2. They were analyzed using a conventional Hamiltonian with quadratic centrifugal distortion parameters. The fitted rotational parameters were consistent with structures having intermolecular separations between 3.25–3.4 Å and angles of about 80° between the N2O axis and the hydrogen center-of-mass. These intermolecular distances are about 0.3 Å shorter than those observed previously for the related system, OCS–hydrogen. The band origins were blueshifted relative to the free N2O molecule by from +0.25 to +0.79 cm−1. These vibrational shifts showed regularities among the different spin and isotopic forms of hydrogen that were analogous to those in OCS–hydrogen.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".