Isotope shifts and fine structures of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mi>Li</mml:mi><mml:none/><mml:none/><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>6</mml:mn><mml:mo>,</mml:mo><mml:mn>7</mml:mn></mml:mrow></mml:mmultiscripts><mml:mspace width="0.3em"/><mml:mi>D</mml:mi></mml:mrow></mml:math>lines and determination of the relative nuclear charge radius
Why this work is in the frame
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Bibliographic record
Abstract
The $^{6,7}\mathrm{Li}\phantom{\rule{0.3em}{0ex}}D$ lines were excited using an electro-optically modulated cw dye laser that intersected an atomic beam. Fluorescence was recorded as the laser was scanned across the resonance. Hence each transition was multiply excited allowing for calibration of the frequency scan. The $^{6,7}\mathrm{Li}\phantom{\rule{0.3em}{0ex}}2P$ fine structures were found to be $10\phantom{\rule{0.2em}{0ex}}052.964\ifmmode\pm\else\textpm\fi{}0.050$ and $10\phantom{\rule{0.2em}{0ex}}053.119\ifmmode\pm\else\textpm\fi{}0.058\phantom{\rule{0.3em}{0ex}}\mathrm{MHz}$. The $D1$ and $D2$ isotope shifts were determined to be $10\phantom{\rule{0.2em}{0ex}}534.039\ifmmode\pm\else\textpm\fi{}0.070$ and $10\phantom{\rule{0.2em}{0ex}}534.194\ifmmode\pm\else\textpm\fi{}0.104\phantom{\rule{0.3em}{0ex}}\mathrm{MHz}$. The latter imply values for the $^{6,7}\mathrm{Li}$ relative nuclear charge radius that are within $20\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}\phantom{\rule{0.3em}{0ex}}\mathrm{fm}$ of each other, which is consistent with the estimated uncertainties.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.003 |
| Meta-epidemiology (broad) | 0.001 | 0.003 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.003 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.076 | 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 it