{"id":"W1836172706","doi":"10.1109/cpem.1998.699931","title":"The strontium single ion optical frequency standard: preliminary absolute frequency measurements using a phase-locked optical frequency chain","year":2002,"lang":"en","type":"article","venue":"","topic":"Advanced Frequency and Time Standards","field":"Physics and Astronomy","cited_by":2,"is_retracted":false,"has_abstract":true,"ca_institutions":"National Research Council Canada","funders":"","keywords":"Frequency standard; Strontium; Ion; Resolution (logic); Atomic physics; Terahertz radiation; Full width at half maximum; Phase (matter); Analytical Chemistry (journal); Physics; Materials science; Optics; Chemistry","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":[0.0007893242,0.0002461817,0.0002569829,0.0007345616,0.0004800606,0.0004181965,0.0006145833,0.0005326704,0.00160822],"category_scores_gemma":[0.001453322,0.000182401,0.0001194122,0.0007061195,0.0006218156,0.00053911,0.0003558048,0.0005859955,0.0004280981],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0004067355,"about_ca_system_score_gemma":0.0005078277,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0007475854,"about_ca_topic_score_gemma":0.00154765,"domain_scores_codex":[0.9993092,0.00008775128,0.00003291614,0.0001430562,0.0003551535,0.00007202999],"domain_scores_gemma":[0.9992505,0.0001732957,0.0001115711,0.0001019394,0.0002984485,0.00006423772],"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":[0.0001590104,0.00001740459,0.001678842,0.00004014823,0.000004165892,0.00003412451,0.00009218496,0.000171415,0.9900329,0.001199736,0.0001115143,0.006458622],"study_design_scores_gemma":[0.00001035692,0.0002480997,0.002742805,0.000004177619,0.000009695062,0.0001108904,0.00003828332,0.00109361,0.9923239,0.0001447765,0.00326476,0.000008504968],"study_design_candidate":"bench_or_experimental","study_design_consensus":"bench_or_experimental","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9515896,0.0004964114,0.04336032,0.0002108767,0.00005964193,0.00007755264,0.0003142035,0.000375195,0.003516128],"genre_scores_gemma":[0.939442,0.000325283,0.05649934,0.00008240663,0.00002176697,0.00008182345,0.0003468707,0.00006972994,0.003130773],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.00160822,"threshold_uncertainty_score":0.005380034,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.04665012018192629,"score_gpt":0.2891948952321672,"score_spread":0.2425447750502409,"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."}}