Laser-Induced Phosphorescence of SO<sub>2</sub> in Solid Neon: Direct Observation of the <i>b</i><sup>3</sup><i>A</i><sub>2</sub> State in the <sup>16</sup>OS<sup>18</sup>O Molecule
Bibliographic record
Abstract
Laser excitation of isotopically labeled SO 2 molecules in a neon matrix has allowed the measurement of dispersed phosphorescence spectra ( ã 3 B 1 - X̃ 1 A 1 ) in the wavelength region 387.5−526.3 nm (19 000−25 800 cm -1 ). The origin of the ã − X̃ transition lies at 25 747 cm -1 in 16 OS 16 O, shifted 18 cm -1 to the red from the gas phase; the three vibrational frequencies of the X̃ state are nearly unperturbed in the neon matrix (1149, 520, and 1362 cm -1 ). As the zero-phonon lines are sharp and well resolved, it has been possible to monitor emission from a specific isotopomer to obtain its excitation spectrum. The excitation spectra of matrix-isolated 16 OS 16 O and 18 OS 18 O in the region 350.9−388.5 nm (25 740−28 500 cm -1 ) are similar to those previously observed in the gas phase, with strong perturbations affecting all vibrational levels above ã 3 B 1 (110) at 27 005 cm -1 (370 nm). Two additional groups of bands are observed for the unsymmetrical isotopomer 18 OS 16 O; they are identified as transitions to levels of the ã 3 B 1 state with v 3 = 1 and as direct transitions to the b̃ 3 A 2 state, which both become allowed in the lower symmetry. The ν 3 frequency of the ã 3 B 1 state of 18 OS 16 O is 922 cm -1; for the b̃ 3 A 2 state, ν 1 ≃ 791 cm -1 and ν 2 ≃ 315 cm -1, while the b̃ (001) level lies 26 653 cm -1 above the X̃ (000) level.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| 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".