Polarized fluorescence by the electron impact excitation of atoms
Bibliographic record
Abstract
Polarized radiation emitted by electron impact excited atoms carries information about the anisotropic population of the magnetic sublevels. An overview of the theory necessary to describe the time evolution of an electron impact excited atom, and therefore the emitted radiation, is presented and applied to three cases. The three cases include the 1s4d-1s2p-1s$\\sp2$ cascade transition in helium, the s4d-3s3p-3s$\\sp2$ cascade transition in magnesium, and the electron impact excitation off of a laser excited P-state to a D-state and subsequent re-emission back to the P-state. The apparatus required to measure the helium, and magnesium cascade transitions has been built. The apparatus consists of an electron gun aimed at an atom vapour beam. The emitted radiation was detected by two photon detectors, one for each level transition. The equipment is tested by comparing the measured polarization of the 1s4d-1s2p transition in helium to existing published data. The polarization of the 3s4d-3s3p transition in magnesium has also been measured. The coincidence measurements required to complete the determination of the magnetic sublevel populations of the D-state for helium, and magnesium have not yet been made.
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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 | 0.000 |
| 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) | 0.002 | 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".