Microscopic description of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>α</mml:mi><mml:mo>+</mml:mo><mml:mi>N</mml:mi></mml:mrow></mml:math>bremsstrahlung by a Siegert approach
Bibliographic record
Abstract
A microscopic cluster model of the nucleus-nucleus bremsstrahlung based on an extension of the Siegert theorem, i.e., based on the charge density rather than on the current, allows including implicitly a part of the effects of meson-exchange currents. This approach was developed in a previous paper for zero-spin nuclei and applied to the $\ensuremath{\alpha}+\ensuremath{\alpha}$ bremsstrahlung. This model is extended to colliding nuclei with nonzero spins and applied to the $\ensuremath{\alpha}+p$ and $\ensuremath{\alpha}+n$ bremsstrahlungs. A comparison between the bremsstrahlung cross sections for these mirror systems is made. The importance of the meson-exchange currents on the $\ensuremath{\alpha}+N$ bremsstrahlungs is discussed by comparing the $E1$ and $E2$ components of the bremsstrahlung cross sections obtained in the Siegert approach where these currents are partly included and in the non-Siegert approach where they are fully neglected.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.006 | 0.003 |
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".