{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T14:10:43Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 4,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T10:00:00Z",
      "ingestedAt": "2026-10-06T07:39:17+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-06T22:40:11+00:00",
        "engine": "codex",
        "fields": [
          "definition",
          "visual_identification"
        ],
        "answering_review": "cd553b92b10b2c4819483ab9736a9a24c23870140c0f0fd977048fa66e1bbfff"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:27+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q1882",
    "registryId": "vr.tr.berkelium",
    "name": "berkelium",
    "version": "0.2.0-wave.4",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.MAT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q1882/",
  "model": {
    "registry_id": "vr.tr.berkelium",
    "name": "berkelium",
    "purpose": "Let an agent explain berkelium and its properties, relay discovery, isotopes and research uses from chemistry references at public reference level, describe its role in synthesising superheavy elements, and distinguish berkelium from neighbouring actinides, without sensitive nuclear detail.",
    "definition": "A synthetic radioactive element with atomic number 97, an actinide first produced in 1949 at Berkeley by Seaborg, Ghiorso and Thompson and named after the city, with known isotopes including berkelium-247 and berkelium-249; berkelium-249 is used as a target to make heavier elements. Berkelium has no uses outside research and is described here at public reference level.",
    "what_it_is_for": "Not applicable; a chemical element.",
    "affordances": [
      "explain properties",
      "relay discovery and isotopes",
      "describe research uses",
      "distinguish related elements"
    ],
    "distinguishing_features": [
      "Synthetic actinide",
      "Research only",
      "Superheavy element target",
      "Milligram scale"
    ],
    "appearance": "A silvery metal, produced only in milligram quantities.",
    "visual_identification": [
      "Berkelium is element 97 and an actinide.",
      "Known isotopes include berkelium-247 and berkelium-249.",
      "Curium is element 96, while californium is element 98."
    ],
    "physical_properties": [
      {
        "quantity": "atomic number",
        "typical_range": "97",
        "unit": "count",
        "note": ""
      },
      {
        "quantity": "discovered",
        "typical_range": "1949",
        "unit": "year",
        "note": "Berkeley"
      },
      {
        "quantity": "berkelium-247 half-life",
        "typical_range": "about 1380",
        "unit": "years",
        "note": ""
      },
      {
        "quantity": "berkelium-249 half-life",
        "typical_range": "330",
        "unit": "days",
        "note": "target for tennessine"
      }
    ],
    "families_and_kinds": [
      "berkelium-249 as a target material",
      "berkelium-247 the longest-lived isotope",
      "short-lived isotopes from berkelium-233 to berkelium-240",
      "berkelium compounds studied in research"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "actinide",
        "why": "in registry terms"
      },
      {
        "relation": "is a kind of",
        "target": "heavy metal",
        "why": "in registry terms"
      },
      {
        "relation": "was used to make",
        "target": "tennessine",
        "why": "as a target"
      },
      {
        "relation": "is named after",
        "target": "Berkeley, California",
        "why": ""
      }
    ],
    "identifiers": [
      {
        "scheme": "CAS",
        "value_or_pattern": "7440-40-6",
        "note": "berkelium"
      },
      {
        "scheme": "symbol",
        "value_or_pattern": "Bk",
        "note": "element symbol"
      }
    ],
    "standards_and_regulation": [
      "Radiation safety regulations",
      "Nuclear material accounting"
    ],
    "failure_modes_and_hazards": [
      "Agents providing sensitive nuclear detail",
      "Registry aliases naming many isotopes",
      "Confusing with neighbouring actinides"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Explain berkelium's place among the actinides and its history as a synthetic element.",
        "Describe its isotopes and half-lives from published nuclear data tables."
      ],
      "must_not": [
        "Provide any guidance that would help obtain, handle or apply nuclear material.",
        "Confuse berkelium with neighbouring actinides when citing properties.",
        "Treat a laboratory-only element as something available for private use.",
        "Present speculative applications as established."
      ],
      "requires_human": [
        "Any handling of radioactive material, which is for licensed facilities only."
      ]
    },
    "ethics": {
      "considerations": [
        "Radioactive materials endanger people who are unaware of exposure.",
        "Nuclear knowledge must be shared in ways that do not aid misuse."
      ],
      "affected_parties": [
        "Laboratory workers",
        "The public",
        "Waste handlers"
      ]
    },
    "owners": {
      "steward": "The licensed research facility that holds any sample; the national nuclear regulator oversees it.",
      "master_systems": [
        "National radioactive material registers"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q1882: berkelium",
      "url": "https://www.wikidata.org/wiki/Q1882",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Berkelium",
      "url": "https://en.wikipedia.org/wiki/Berkelium",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What berkelium is.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition and properties.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "What is berkelium, and how does it differ from curium and californium?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the element, an isotope, research use or sensitive matters the model does not cover?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "isotopes",
            "name": "Isotopes",
            "description": "Isotopes.",
            "findings": [
              {
                "id": "isotopes-finding",
                "name": "Isotopes",
                "description": "Isotopes.",
                "questions": [
                  {
                    "text": "What are berkelium-247, berkelium-249 and the short-lived isotopes, at public reference level?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific isotope?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "research",
        "name": "Research",
        "description": "Research uses.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "superheavy",
            "name": "Superheavy",
            "description": "Superheavy elements.",
            "findings": [
              {
                "id": "superheavy-finding",
                "name": "Superheavy",
                "description": "Superheavy.",
                "questions": [
                  {
                    "text": "How was berkelium-249 used to discover tennessine, as published?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "chemistry",
            "name": "Chemistry",
            "description": "Chemistry.",
            "findings": [
              {
                "id": "chemistry-finding",
                "name": "Chemistry",
                "description": "Chemistry.",
                "questions": [
                  {
                    "text": "What is known about berkelium chemistry and compounds?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "production",
        "name": "Production",
        "description": "Production and safety.",
        "rationale": "Regulation.",
        "layers": [
          {
            "id": "production",
            "name": "Production",
            "description": "Production.",
            "findings": [
              {
                "id": "production-finding",
                "name": "Production",
                "description": "Production.",
                "questions": [
                  {
                    "text": "Where and how is berkelium produced, at public reference level?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is the presentation non-sensitive?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "safety",
            "name": "Safety",
            "description": "Safety.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Safety.",
                "questions": [
                  {
                    "text": "What radiation safety rules apply to berkelium?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits radiation protection?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "History.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "history",
            "name": "History",
            "description": "History.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How was berkelium discovered and named?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits Lawrence Berkeley National Laboratory?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "table",
            "name": "Table",
            "description": "Periodic table.",
            "findings": [
              {
                "id": "table-finding",
                "name": "Table",
                "description": "Table.",
                "questions": [
                  {
                    "text": "Where does berkelium sit among the actinides?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits actinide?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should berkelium-249 be a separate entry?",
    "How should chemistry references be linked?",
    "The registry entry has merged aliases naming isotopes; should they be split off?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}