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 190Pt alpha decay modes to the first and second excited level of 186Os 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 190Pt with the highest precision to date as T1/2 = 2.59 ± 0.04 (stat.) ± 0.24 (syst.) × 1014 a, in which systematic uncertainties dominate. The search for the alpha decay into the second excited state of 186Os resulted in a lower limit of 2.8 × 1016 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 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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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".