FIRST HIGH RESOLUTION IR SPECTRA OF 1-13C-PROPANE. THE ν9 B-TYPE BAND NEAR 366.404 cm−1AND THE ν26 C-TYPE BAND NEAR 748.470 cm−1. DETERMINATION OF GROUND AND UPPER STATE CONSTANTS.
Bibliographic record
Abstract
We report in this talk on the first high resolution IR spectra ($Delta$$nu$ = 0.0009 wn) of the 1-$^{13}$C-Propane isotopologue. Spectra were taken on the Bruker FTS instrument on the Far-IR beamline at the Canadian National Synchrotron (CLS) located at the University of Saskatchewan. The nub{9} B-type band centered near 366.404 wn _x000d_\n appears unperturbed and lines were assigned up to K = 17 and J = 50. Since the 1960 MW study of Lidefootnote{Lide, J. Chem. Phys. textbf{33}, p. 1514 ff. (1960)} only used 6 J lines of K = 0 we had to use GSCD analyses to determine a fuller set of molecular constants for this molecule. _x000d_\nSince normal propane has been detected using the nub{26} C-type band in Titan and other astrophysical objects our main focus was on the analagous bands for the both the 1-$^{13}$C and 2-$^{13}$C isotopologues. Assigned lines up to K = 17, J = 50 in nub{26} were analyzed with GSCD to independently obtain ground state rotational constants. These were consistent with those obtained from the nub{9} analysis. Upper state constants were also determined that reproduce the vast majority of this band. As in the normal and 2-$^{13}$C species a Coriolis resonance with the 2nub{9} state causes lines of most K levels above 15 to be shifted.footnote{Flaud, Kwabia Tchana, Lafferty & Nixon, Mol. Phys. textbf{108}, p. 699 ff. (2010)} We did not have enough sample available at the time of these experiments to be able to record the 2nub{9} - nub{9} hot band transitions in the low frequency study of nub{9}. _x000d_
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.008 | 0.001 |
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".