Recoil ions from the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Sb</mml:mi><mml:mprescripts/><mml:none/><mml:mn>134</mml:mn></mml:mmultiscripts></mml:math> confined in a Paul trap
Bibliographic record
Abstract
The low-energy recoiling ions from the $\ensuremath{\beta}$ decay of $^{134}\mathrm{Sb}$ were studied by using the Beta-decay Paul Trap. Using this apparatus, singly charged ions were suspended in vacuum at the center of a detector array used to detect emitted $\ensuremath{\beta}$ particles, $\ensuremath{\gamma}$ rays, and recoil ions in coincidence. The recoil ions emerge from the trap with negligible scattering, allowing $\ensuremath{\beta}$-decay properties and the charge-state distribution of the daughter ions to be determined from the $\ensuremath{\beta}$-ion coincidences. First-forbidden $\ensuremath{\beta}$-decay theory predicts a $\ensuremath{\beta}\text{\ensuremath{-}}\ensuremath{\nu}$ correlation coefficient of nearly unity for the ${0}^{\ensuremath{-}}$ to ${0}^{+}$ transition from the ground state of $^{134}\mathrm{Sb}$ to the ground state of $^{134}\mathrm{Te}$. Although this transition was expected to have a nearly 100% branching ratio, an additional 17.2(52)% of the $\ensuremath{\beta}$-decay strength must populate high-lying excited states to obtain an angular correlation consistent with unity. The extracted charge-state distribution of the recoiling ions was compared with existing $\ensuremath{\beta}$-decay results and the average charge state was found to be consistent with the results from lighter nuclei.
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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 | 0.003 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.003 |
| Meta-epidemiology (broad) | 0.002 | 0.004 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.003 | 0.004 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.004 | 0.004 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.004 | 0.009 |
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; both teacher heads agree on what is shown here.
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".