High-resolution vacuum ultraviolet laser spectroscopy of the C 0<sup>+</sup><sub>u</sub> ← X 0<sup>+</sup><sub>g</sub> transition of Xe<sub>2</sub>
Bibliographic record
Abstract
Rotationally resolved (1 + 1′), resonance-enhanced, two-photon ionization spectra of the C 0 + u ← X 0 + g transition of several isotopomers of Xe 2 have been recorded. Rotational constants have been determined for the v′ = 1426 levels of the C 0 + u Rydberg state and the v′′ = 0 and 1 levels of the X 0 + g ground state, and band origins have been determined with an absolute accuracy of 0.015 cm 1 for the transitions to the v′ = 1426 levels of the C 0 + u state of the 129 Xe 2 , 129 Xe 132 Xe, and 131 Xe 136 Xe isotopomers. The equilibrium internuclear separation of the X 0 + g ground state (R e = 4.3773(49) Å) was determined from the rotational constants of the v′′ = 0 and 1 levels. The analysis of the isotopic shifts of the band origins enabled the confirmation of the absolute numbering of the vibrational levels of the C 0 + u state determined by Lipson et al. (R.H. Lipson, P.E. Larocque, and B.P. Stoicheff. J. Chem. Phys. 82, 4470 (1985)). A semiempirical interaction potential for the X 0 + g ground state was derived in a nonlinear fitting procedure using the present spectroscopic results, the positions of the v′′ = 29 levels determined by Freeman et al. (D.E. Freeman, K. Yoshino, and Y. Tanaka. J. Chem. Phys. 61, 4880 (1974)) and experimental values for the second virial coefficient. The interaction potential is similar to previous semiempirical potentials but the dissociation energy (D e = (196.1 ± 1.1) cm 1 ) differs from the value of 183.1 cm 1 determined in the latest ab initio calculation (P. Slavíček, R. Kalus, P. Paka, I. Odvárková, P. Hobza, and A. Malijevský. J. Chem. Phys. 119, 2102 (2003)). Key words: high-resolution vacuum ultraviolet laser spectroscopy, rare gas dimers and their cations, photoionisation, Xe 2 , rotationally resolved electronic spectrum.
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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 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 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".