{"id":"W2317379416","doi":"10.1021/ac401605s","title":"Measurement of the <sup>13</sup>C/<sup>12</sup>C of Atmospheric CH<sub>4</sub> Using Near-Infrared (NIR) Cavity Ring-Down Spectroscopy","year":2013,"lang":"en","type":"article","venue":"Analytical Chemistry","topic":"Spectroscopy and Laser Applications","field":"Chemistry","cited_by":34,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Toronto","funders":"National Aeronautics and Space Administration","keywords":"Chemistry; Cavity ring-down spectroscopy; Analytical Chemistry (journal); Laser; Spectroscopy; Ring laser; Infrared; Infrared spectroscopy; Absorption (acoustics); Diode; Optics; Optoelectronics; Materials science; 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":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0004517167,0.0005829456,0.0002950117,0.0004974237,0.0005856513,0.0004750236,0.0009046476,0.0008012345,0.001346544],"category_scores_gemma":[0.0009425849,0.0003068805,0.0002418131,0.0004405061,0.0005720129,0.0005483857,0.0006488533,0.0005589377,0.0003141054],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0006768642,"about_ca_system_score_gemma":0.0006655421,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.003735928,"about_ca_topic_score_gemma":0.00773275,"domain_scores_codex":[0.9994325,0.00005089439,0.00001717207,0.0001704759,0.0002765032,0.00005244125],"domain_scores_gemma":[0.9995678,0.0001022596,0.00006805968,0.00003701996,0.0001975514,0.00002735023],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.00009398832,0.00001302805,0.004989969,0.00005095574,0.00001474737,0.00002764443,0.00003099125,0.0001991778,0.9900967,0.0001012144,0.0000788313,0.00430284],"study_design_scores_gemma":[0.00001028467,0.000110578,0.01349416,0.000005434847,0.00002450922,0.0001034701,0.00004385563,0.002816165,0.9814776,0.00005715982,0.001838768,0.00001819037],"study_design_candidate":"bench_or_experimental","study_design_consensus":"bench_or_experimental","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9720711,0.0008683189,0.02336329,0.00009399996,0.00007132348,0.00008923321,0.0008598641,0.0002512529,0.002331583],"genre_scores_gemma":[0.9558394,0.000669665,0.04072406,0.0001157768,0.00004440853,0.000113462,0.0005492764,0.00006051697,0.001883371],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.003735928,"threshold_uncertainty_score":0.007428348,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.014006174765027,"score_gpt":0.2379544424525087,"score_spread":0.2239482676874817,"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."}}