Laser Spectroscopic Determination of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">H</mml:mi><mml:mprescripts/><mml:none/><mml:mn>6</mml:mn></mml:mmultiscripts><mml:mi mathvariant="normal">e</mml:mi></mml:math>Nuclear Charge Radius
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
We have performed precision laser spectroscopy on individual $^{6}\mathrm{H}\mathrm{e}$ (${t}_{1/2}=0.8\text{ }\text{ }\mathrm{s}$) atoms confined and cooled in a magneto-optical trap, and measured the isotope shift between $^{6}\mathrm{H}\mathrm{e}$ and $^{4}\mathrm{H}\mathrm{e}$ to be $43\text{ }\text{ }194.772\ifmmode\pm\else\textpm\fi{}0.056\text{ }\text{ }\mathrm{M}\mathrm{H}\mathrm{z}$ for the ${2}^{3}{S}_{1}\ensuremath{-}{3}^{3}{P}_{2}$ transition. Based on this measurement and atomic theory, the nuclear charge radius of $^{6}\mathrm{H}\mathrm{e}$ is determined for the first time in a method independent of nuclear models to be $2.054\ifmmode\pm\else\textpm\fi{}0.014\text{ }\text{ }\mathrm{f}\mathrm{m}$. The result is compared with the values predicted by a number of nuclear structure calculations and tests their ability to characterize this loosely bound halo nucleus.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.002 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.007 | 0.004 |
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