High-resolution laser spectroscopy of YbS: Deperturbation analysis of the A0+–X0+ transition
Bibliographic record
Abstract
The A0+–X0+ electronic transition of Yb172S32, Yb174S32, and Yb176S32 has been rotationally analyzed for the first time. Doppler-limited laser excitation spectroscopy with selective detection of fluorescence was used to obtain spectra of the 0–0, 0–1, 1–1, 1–2, 2–2, and 2–3 bands with a measurement precision of approximately 0.003 cm−1. The 2–2 and 2–3 bands were found to be perturbed by a level crossing that occurs in the A0+ υ=2 level. In total, over 1500 line positions have been measured, assigned, and employed in least-squares fits of molecular parameters. The principal deperturbed results for the X0+ state, which arises primarily from the Yb2+(4f14)S2− electronic configuration, are Re=2.3591(2) Å and ωe(174YbS)=366.714(2) cm−1, and for the A0+ state, R0(174YbS)=2.3905(2) Å.
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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 | 0.001 |
| 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 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".