Lifetime measurements of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">C</mml:mi><mml:mprescripts/><mml:none/><mml:mn>17</mml:mn></mml:mmultiscripts></mml:math>excited states and three-body and continuum effects
Bibliographic record
Abstract
We studied transition rates for the lowest $1/{2}^{+}$ and $5/{2}^{+}$ excited states of $^{17}\mathrm{C}$ through lifetime measurements with the GRETINA array using the recoil-distance method. The present measurements provide a model-independent determination of transition strengths giving the values of $B(M1;1/{2}^{+}\ensuremath{\rightarrow}3/{2}_{\mathrm{g}.\mathrm{s}.}^{+})=1.{04}_{\ensuremath{-}0.12}^{+0.03}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}{\ensuremath{\mu}}_{N}^{2}$ and $B(M1;5/{2}^{+}\ensuremath{\rightarrow}3/{2}_{\mathrm{g}.\mathrm{s}.}^{+})=7.{12}_{\ensuremath{-}0.96}^{+1.27}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}{\ensuremath{\mu}}_{N}^{2}$. The quenched $M1$ transition strength for the $1/{2}^{+}\ensuremath{\rightarrow}3/{2}_{\mathrm{g}.\mathrm{s}.}^{+}$ transition, with respect to the $5/{2}^{+}\ensuremath{\rightarrow}3/{2}_{\mathrm{g}.\mathrm{s}.}^{+}$ transition, has been confirmed with greater precision. The current data are compared to importance-truncated no-core shell model calculations addressing effects due to continuum and three-body forces.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.007 | 0.002 |
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".