Measurement of Neutron Recoil Polarization in Deuteron Photodisintegration
Bibliographic record
Abstract
An experiment at the High Intensity Gamma Source (HIGS) at the Triangle University Nuclear Laboratory (TUNL) was recently performed to measure the polarization of recoiling neutrons from photodisintegration of deuterium nuclei. As the simplest, multi-body nucleus, the deuteron offers a unique opportunity to study nucleon-nucleon interactions. Over the years, nuclear theory has developed to be able to describe the behavior and structure of few-body nuclei fairly well. However, discrepancies between theory and experimental data persist in measurements of polarization observables. The recoil polarization in $d(\gamma, \vec{n})p$ is a prime example of such a measurement. The purpose of the experiment was to map the polarization transfer for photon energies below 20 MeV and three laboratory angles. The setup consisted of high pressure $^{4}$He-Xe polarization analyzers surrounded by neutron scintillation counters to measure the asymmetry in the scattering of polarized neutrons. From this measurement, the polarized and unpolarized photon beam contributions to the neutron polarization will be extracted and compared to theory.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".