Coulomb excitation of the 3<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow/><mml:mo>−</mml:mo></mml:msup></mml:math>isomer in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow/><mml:mn>70</mml:mn></mml:msup></mml:math>Cu
Bibliographic record
Abstract
Post-accelerated isomerically purified radioactive beams, available at the CERN On-Line Isotope Mass Separator facility using the resonant ionization laser technique, have been used to study the Coulomb excitation of the ${I}^{\ensuremath{\pi}}$ = 3${}^{\ensuremath{-}}$ state in ${}^{70}$Cu ($Z=29$, $N=41$). While first results using a ${I}^{\ensuremath{\pi}}={6}^{\ensuremath{-}}$ beam were reported previously, the present complementary experiment allows us to complete the study of the multiplet of states (3${}^{\ensuremath{-}}$, 4${}^{\ensuremath{-}}$, 5${}^{\ensuremath{-}}$, 6${}^{\ensuremath{-}}$) arising from the $\ensuremath{\pi}2{p}_{3/2}\ensuremath{\nu}1{g}_{9/2}$ configuration. Besides the known $\ensuremath{\gamma}$-ray transition deexciting the 4${}^{\ensuremath{-}}$ state, a ground-state $\ensuremath{\gamma}$ ray of 511(3) keV was observed for the first time and was unambiguously associated with the 5${}^{\ensuremath{-}}$ state deexcitation. This observation fixes the energy, spin, and parity of this state, completing the low-energy level scheme of ${}^{70}$Cu. $B(E2)$ values for all possible $E2$ transitions within the multiplet were determined. A comparison with large-scale shell model calculations using different interactions and valence spaces shows the importance of proton excitation across the $Z=28$ shell gap and the role of the $2{d}_{5/2}$ neutron orbital.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.018 | 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 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".