{ "model": { "rank": 1758, "code": "thing-q37147", "model_id": "vr.tr.atomic-nucleus", "name": "atomic nucleus", "purpose": "Let an agent explain nuclear structure and properties, describe nuclear reactions and stability at a general level, support education, and route safety questions to appropriate guidance without operational weapons detail.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.STA", "industry": "", "version": "", "url": "/models/thing/q37147/", "tier": 2, "score": 128, "payload": { "layer": "wikidata", "aliases": [ "halo nucleus", "daughter nucleus", "hypernucleus", "exotic nucleus", "hydron", "helion" ], "aliasCount": 6, "merged": 6, "knownIn": 128, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q37147", "url": "https://www.wikidata.org/wiki/Q37147", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T16:05:29Z", "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": 1, "engine": "claude" }, "metaModel": { "id": "THING-Q37147", "registryId": "vr.tr.atomic-nucleus", "name": "atomic nucleus", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.STA" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q37147/", "model": { "registry_id": "vr.tr.atomic-nucleus", "name": "atomic nucleus", "purpose": "Let an agent explain nuclear structure and properties, describe nuclear reactions and stability at a general level, support education, and route safety questions to appropriate guidance without operational weapons detail.", "definition": "The small, dense region at the centre of an atom consisting of protons and neutrons bound by the strong nuclear force, carrying almost all the atom mass and a positive charge equal to its atomic number; nuclei include exotic forms such as halo nuclei and hypernuclei, and nuclear structure and reactions are studied in nuclear physics.", "what_it_is_for": "Nuclear physics, chemistry and energy.", "affordances": [ "explain nuclear composition and forces", "compute binding energy and stability trends", "explain fission, fusion and decay at a general level", "describe exotic nuclei" ], "distinguishing_features": [ "Protons and neutrons", "Strong force binding", "Almost all atomic mass", "Determines element and isotope" ], "appearance": "Not visible; a region about 10^-15 to 10^-14 metres across.", "visual_identification": [ "Protons and neutrons", "Far smaller than the atom", "Electrons form the surrounding cloud" ], "physical_properties": [ { "quantity": "radius", "typical_range": "about 1-10", "unit": "fm", "note": "depending on mass number" } ], "families_and_kinds": [ "stable nuclei", "radioactive nuclei", "exotic nuclei such as halo nuclei", "hypernuclei", "light nuclei such as the hydron and helion" ], "related_models": [ { "relation": "is a kind of", "target": "bound state", "why": "category" }, { "relation": "is a kind of", "target": "charged particle", "why": "category" }, { "relation": "is characterised by", "target": "mass number", "why": "quantity" }, { "relation": "emits", "target": "radiation", "why": "in decay" } ], "identifiers": [], "standards_and_regulation": [ "IUPAC and IUPAP nomenclature", "Nuclear safety and non-proliferation regulations" ], "failure_modes_and_hazards": [ "Providing weapons-relevant detail", "Confusing nuclear and chemical processes", "Misstating radiation risks" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "structure", "name": "Structure", "description": "What nuclei are.", "rationale": "Nucleons and forces.", "layers": [ { "id": "composition", "name": "Composition", "description": "Protons and neutrons.", "findings": [ { "id": "composition-finding", "name": "Composition", "description": "Composition.", "questions": [ { "text": "How many protons and neutrons does this nucleus have, and what element and isotope is it?", "kind": "measurement" }, { "text": "How large is it?", "kind": "measurement" } ] } ] }, { "id": "forces", "name": "Forces", "description": "Binding.", "findings": [ { "id": "forces-finding", "name": "Forces", "description": "Binding.", "questions": [ { "text": "How does the strong force bind the nucleus against electrostatic repulsion?", "kind": "definition" }, { "text": "What is binding energy per nucleon, and how does it vary?", "kind": "measurement" } ] } ] } ] }, { "id": "stability", "name": "Stability", "description": "Decay and stability.", "rationale": "Trends explain decay.", "layers": [ { "id": "decay", "name": "Decay", "description": "Radioactive decay.", "findings": [ { "id": "decay-finding", "name": "Decay", "description": "Decay.", "questions": [ { "text": "Is this nucleus stable, and if not, how does it decay?", "kind": "provenance" }, { "text": "What is its half-life?", "kind": "measurement" } ] } ] }, { "id": "models", "name": "Models", "description": "Nuclear models.", "findings": [ { "id": "models-finding", "name": "Models", "description": "Models.", "questions": [ { "text": "What do the liquid drop and shell models explain?", "kind": "definition" }, { "text": "What are magic numbers?", "kind": "definition" } ] } ] } ] }, { "id": "reactions", "name": "Reactions", "description": "Fission and fusion.", "rationale": "General level.", "layers": [ { "id": "energy", "name": "Energy", "description": "Energy release.", "findings": [ { "id": "energy-finding", "name": "Energy", "description": "Energy release.", "questions": [ { "text": "Why do fission and fusion release energy, in general terms?", "kind": "definition" }, { "text": "How are they used in power generation and research?", "kind": "provenance" } ] } ] }, { "id": "limits", "name": "Limits", "description": "Weapons-relevant detail.", "findings": [ { "id": "limits-finding", "name": "Limits", "description": "Limits.", "questions": [ { "text": "Does the request seek weapons design or enrichment detail?", "kind": "boundary" }, { "text": "How should the agent keep to educational content?", "kind": "action" } ] } ] } ] }, { "id": "exotic", "name": "Exotic", "description": "Research frontiers.", "rationale": "Unusual nuclei.", "layers": [ { "id": "halo", "name": "Halo", "description": "Halo and hypernuclei.", "findings": [ { "id": "halo-finding", "name": "Halo", "description": "Exotic nuclei.", "questions": [ { "text": "What are halo nuclei and hypernuclei, and how are they made and studied?", "kind": "provenance" }, { "text": "Which facilities produce them?", "kind": "provenance" } ] } ] }, { "id": "teach", "name": "Teach", "description": "Teaching.", "findings": [ { "id": "teach-finding", "name": "Teach", "description": "Teaching.", "questions": [ { "text": "How can nuclear structure be taught with models and data?", "kind": "action" }, { "text": "Which misconceptions arise?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should nuclear reactions be a separate entry?", "How should nuclear data tables be linked?", "How should safety guidance be linked?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a atomic nucleus, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain nuclear structure and properties, describe nuclear reactions and stability at a general level, support education, and route safety questions to appropriate guidance without operational weapons detail.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: halo nucleus, daughter nucleus, hypernucleus, exotic nucleus, hydron, helion.", "6 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 128 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a atomic nucleus, and on what evidence are they told apart?" ], "whatItIsMadeOf": "an abstraction with no physical instance", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "halo nucleus", "daughter nucleus", "hypernucleus", "exotic nucleus", "hydron", "helion" ] } ], "standing": "Described in 128 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 6 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one atomic nucleus from another, and a atomic nucleus from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a atomic nucleus sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a atomic nucleus from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a atomic nucleus passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a atomic nucleus between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a atomic nucleus, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a atomic nucleus is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What atomic nucleus is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of atomic nucleus are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is atomic nucleus operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of atomic nucleus and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of atomic nucleus?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as atomic nucleus?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a atomic nucleus came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a atomic nucleus and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a atomic nucleus is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a atomic nucleus, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a atomic nucleus, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a atomic nucleus is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 5, "layers": 10, "findings": 12, "questions": 32 } } } }