Mirror symmetry in the f7/2 shell below 56Ni, excited states and electromagnetic transition rates in 55Ni and 55Co
Bibliographic record
Abstract
Mirror nuclei near doubly magic 56 Ni are being explored at TRIUMF, Canada's particle accelerator centre. A stable 20 Ne beam experiment to produce 55 Co and a complimentary radioactive 21 Na beam experiment to produce 55 Ni were conducted. These experiments leveraged TIGRESS for γ rays, SFU's TIP CsI Ball for charged particles, specialized Ca targetry, and Doppler-shift lifetime methods. Additionally, the 55 Ni experiment used EMMA for enhanced selectivity. These experiments aim to identify the energies, spins, and parities of excited states in 55 Ni, establish mirror energy differences between 55 Ni and 55 Co, compare the excitation of reaction products at different beam energies (50, 55, 60 MeV) for 55 Co, measure the temperature of 60 Zn and 61 Ga compound nuclei, measure EM transition rates for the states in 55 Ni and 55 Co, and provide reliable data for shell model calculations for hole states in the f 7 / 2 nuclear orbital near 56 Ni. This proceeding reviews the methodology behind and current state of the 55 Co experiment analysis with preliminary results.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 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) | 0.005 | 0.000 |
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".