INFRARED SPECTRUM OF CO-O2, A 'NEW' WEAKLY-BOUND COMPLEX
Bibliographic record
Abstract
Only a few weakly-bound complexes containing the O$_{2}$ molecule have been characterized by high-resolution spectroscopy, notably N$_{2}$O-O$_{2}$ [1] \nand HF-O$_{2}$ [2]. This neglect is no doubt due in part to the complications added by the oxygen unpaired electron spin. Here we report an extensive infrared spectrum of CO-O$_{2}$, as observed in the CO fundamental band region ($\\sim$2150 \\wn) using a tunable quantum cascade laser to probe a pulsed supersonic jet expansion. The derived energy level pattern consists of ‘stacks’ characterized by $K$, the projection of the total angular momentum on the intermolecular axis. Five such stacks are observed in the ground vibrational state, and ten in the excited state, v(CO) = 1. They are divided into two groups, with no observed transitions between groups, and we believe these groups correlate with the two lowest rotational states of O$_{2}$, namely ($N$, $J$) = (1, 0) and (1, 2). In many ways, the spectrum and energy levels are similar to those of CO-N$_{2}$ [3], and we use the same approach for analysis, simply fitting each stack with its own origin, $B$-value, and distortion constants. The rotational constant of the lowest stack in the ground state (with $K$ = 0) implies an effective intermolecular separation of 3.82 \\AA, but this should be interpreted with caution since it ignores possible effects of electron spin. \n\\vskip 0.2 truecm \n[1] H.-B. Qian, D. Seccombe, and B.J. Howard, \\textit{J. Chem. Phys.} \\textbf{107}, 7658 (1997). \n \n[2] W.M. Fawzy, C.M. Lovejoy, D.J. Nesbitt, and J.T. Hougen, \\textit{J. Chem. Phys.} \\textbf{117}, 693 (2002)
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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".