Measurement of <sup>190</sup>Pt alpha decay modes with gamma emission using a novel approach with an ultra-low-background high purity germanium detector
Bibliographic record
Abstract
Abstract A new measurement of 190 Pt alpha decay modes to the first and second excited level of 186 Os has been done at the Gran Sasso Underground Laboratory (LNGS, Italy). With a new experimental set-up a total exposure of 23.107 kg d has been accumulated. The novel approach to detect rare decays made it possible to measure the half-life for the alpha decay into the first excited state of 190 Pt with the highest precision to date as T 1/2 = 2.59 ± 0.04 (stat.) ± 0.24 (syst.) × 10 14 a, in which systematic uncertainties dominate. The search for the alpha decay into the second excited state of 186 Os resulted in a lower limit of 2.8 × 10 16 a (90% C.L.), which is nonetheless an improvement of one order of magnitude compared to existing results.
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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 | 0.001 |
| 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".