Photon‐In Photon‐Out Spectroscopic Techniques for Materials Analysis: Some Recent Developments
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Bibliographic record
Abstract
This chapter presents the recent developments of two synchrotron materials analysis techniques and their synergy under the common theme of photon-in photon-out spectroscopic techniques. The first technique is fluorescence yield (FLY) and inverse partial fluorescence yield (IPFY) for X-ray absorption near edge structure (XANES) measurements using Si drift detectors; a study of LiFePO 4 (LFP) is used as the example. In the soft X-ray region, nearly all the photons are absorbed because the samples are often thicker than the attenuation length. The second technique is 2D XANES-X-ray excited optical luminescence (XEOL) spectroscopy in both the energy and time domain for the investigation of the band gap and optical properties of light-emitting ZnO-GaN nanostructure solid solutions. The lifetime of the optical decay of XEOL (TRXEOL) from GaN-ZnO (GZNO) has been investigated using an optical streak camera (OSC) with a fast sweep. The chapter then discusses the prospects of the techniques for future applications and other related studies.
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.132 | 0.005 |
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 it