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 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 | 0.002 | 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 | 0.002 | 0.003 |
| Scholarly communication | 0.001 | 0.003 |
| Open science | 0.004 | 0.004 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.001 | 0.007 |
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".