High-Resolution Laser Spectroscopy of CaS: Deperturbation Analysis of the AΣ<sup>+</sup>−X<sup>1</sup>Σ<sup>+</sup> Transition
Bibliographic record
Abstract
The A 1 Σ + −X 1 Σ + electronic transition in CaS has been rotationally analyzed using high-resolution, laser excitation spectroscopy. Doppler-limited spectra were recorded for the 0−0, 1−0, 1−1, 2−1, 3−1, 3−2, 4−2, 4−3, 5−3, 5−4, 6−4 and 6−5 bands with a measurement precision of approximately 0.003 cm -1 . In total, more than 1200 line positions have been measured, assigned and employed in least-squares fits of molecular parameters. The A 1 Σ + state is extensively perturbed and level crossings have been identified and analyzed in the A 1 Σ + υ = 3, 4, 5, and 6 vibrational levels. The perturbations are believed to arise from interactions of the A 1 Σ + state with the a 3 Π and A ‘ 1 Π states. Term values and effective rotational parameters for the perturbing states are obtained through a partial deperturbation analysis of the perturbed bands. Estimated values of the principal molecular parameters are T 00 = 15194.428(2) cm -1, R e ‘ = 2.38626(16) Å, and ω e ‘ = 409.077(9) cm -1 for the A 1 Σ + state, and R e ‘ ‘ = 2.31770(14) Å and ω e ‘ ‘ = 462.273(12) cm -1 for the X 1 Σ + state.
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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 | 0.001 |
| 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".