High-spin structures in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Xe</mml:mi><mml:mprescripts/><mml:none/><mml:mn>132</mml:mn></mml:mmultiscripts></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Xe</mml:mi><mml:mprescripts/><mml:none/><mml:mn>133</mml:mn></mml:mmultiscripts></mml:math> and evidence for isomers along the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>79</mml:mn></mml:mrow></mml:math> isotones
Bibliographic record
Abstract
The transitional nuclei $^{132}\mathrm{Xe}$ and $^{133}\mathrm{Xe}$ are investigated after multinucleon-transfer (MNT) and fusion-evaporation reactions. Both nuclei are populated (i) in $^{136}\mathrm{Xe}+^{208}\mathrm{Pb}$ MNT reactions employing the high-resolution Advanced GAmma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (ii) in the $^{136}\mathrm{Xe}+^{198}\mathrm{Pt}$ MNT reaction employing the GAMMASPHERE spectrometer in combination with the gas-detector array CHICO, and (iii) as an evaporation residue after a $^{130}\mathrm{Te}(\ensuremath{\alpha},xn)^{134\ensuremath{-}xn}\mathrm{Xe}$ fusion-evaporation reaction employing the HORUS $\ensuremath{\gamma}$-ray array at the University of Cologne. The high-spin level schemes are considerably extended above the ${J}^{\ensuremath{\pi}}=({7}^{\ensuremath{-}})$ and $({10}^{+})$ isomers in $^{132}\mathrm{Xe}$ and above the $11/{2}^{\ensuremath{-}}$ isomer in $^{133}\mathrm{Xe}$. The results are compared to the high-spin systematics of the $Z=54$ as well as the $N=78$ and $N=79$ chains. Furthermore, evidence is found for a long-lived (${T}_{1/2}\ensuremath{\gg}1\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}\mathrm{s}$) isomer in $^{133}\mathrm{Xe}$ which closes a gap along the $N=79$ isotones. Shell-model calculations employing the SN100PN and PQM130 effective interactions reproduce the experimental findings and provide guidance to the interpretation of the observed high-spin features.
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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 | 0.007 | 0.007 |
| Meta-epidemiology (narrow) | 0.005 | 0.007 |
| Meta-epidemiology (broad) | 0.003 | 0.007 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.009 | 0.009 |
| Scholarly communication | 0.008 | 0.007 |
| Open science | 0.010 | 0.011 |
| Research integrity | 0.005 | 0.008 |
| Insufficient payload (model declined to judge) | 0.019 | 0.006 |
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".