New Developments in Diffusion Measurements Using Laboratory-Based X-Ray Sources
Bibliographic record
Abstract
Measurements of diffusion and sorption properties of rocks are key aspects of site characterization for a deep geological repository. Knowledge of diffusion properties is required for engineered barriers and for geologic materials in the near and far field surrounding a proposed geologic repository. Accordingly, diffusion investigations are commonly conducted at a variety of scales, ranging from 10s of mm to 100s of m. This work is focused on measurements conducted at the laboratory scale, most often using samples of drill core. In the context of radioactive waste management, X-ray radiography methods have been in use for decades The measurements have the advantage of being rapid and they provide time-and spatially-resolved tracer data. Studies commonly employ iodide as a tracer because it has a high Xray absorption cross section and it is transported conservatively in most geologic materials, but X-ray radiography has also been applied to study reactive transport of cesium Here we report on two new developments; i) X-ray absorption measurements using energy-dispersive X-ray spectrometers, and ii) a radiographic method suitable for low porosity rocks.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".