{"id":"W2314768529","doi":"10.1021/es400026m","title":"Measurements of <sup>236</sup>U in Ancient and Modern Peat Samples and Implications for Postdepositional Migration of Fallout Radionuclides","year":2013,"lang":"en","type":"article","venue":"Environmental Science & Technology","topic":"Radioactive contamination and transfer","field":"Environmental Science","cited_by":43,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Alberta","funders":"","keywords":"Ombrotrophic; Peat; Plutonium; Uranium; Interglacial; Radionuclide; Accelerator mass spectrometry; Deposition (geology); Bog; Environmental science; Geology; Radiocarbon dating; Chemistry; Radiochemistry; Nuclear physics; Sediment; Quaternary; Geomorphology; Archaeology; Geography; Paleontology; Physics","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.000210554,0.00009532928,0.0001283206,0.0002064312,0.0001258477,0.00001125905,0.0001729878,0.00006019952,0.00008129791],"category_scores_gemma":[0.00002675542,0.00008999604,0.00002062011,0.0002735087,0.001778216,0.0003706754,0.00008721102,0.00005032802,0.000003653875],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0001709426,"about_ca_system_score_gemma":0.000009017147,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0001665315,"about_ca_topic_score_gemma":0.0000973513,"domain_scores_codex":[0.9990233,0.00001479029,0.0002232787,0.0003343735,0.0002128252,0.0001913877],"domain_scores_gemma":[0.9997065,0.00002959827,0.00005777861,0.0001426977,0.000008263091,0.00005516695],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"observational","study_design_scores_codex":[0.00000343618,0.00007181596,0.4573635,0.000002473152,0.000002109898,3.719007e-8,0.0002497381,0.0002433938,0.5282671,0.0002174199,0.000004301347,0.01357468],"study_design_scores_gemma":[0.0003620694,0.0001201592,0.920761,0.000007565633,0.000006729178,0.000008965068,0.0002606588,0.003594085,0.07309584,0.001651603,0.00004710046,0.00008419533],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9951869,0.0001197015,0.003043405,0.0009486205,0.000007653625,0.0005090134,0.00002488218,0.00001013944,0.0001496771],"genre_scores_gemma":[0.9962856,0.00005047829,0.00348405,0.00005439738,0.000001969172,0.00009680563,0.000007285983,0.000005027818,0.00001435595],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.4633975,"threshold_uncertainty_score":0.6551909,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01604455117642629,"score_gpt":0.2244561418122561,"score_spread":0.2084115906358298,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}