{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.atomic-nucleus","code":"thing-q37147","url":"https://ver.cy/models/thing/q37147/","name":"atomic nucleus","alternateNames":["halo nucleus","daughter nucleus","hypernucleus","exotic nucleus","hydron","helion"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.STA"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"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.","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.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Protons and neutrons","Strong force binding","Almost all atomic mass","Determines element and isotope"],"structure":{"bundles":[{"id":"structure","name":"Structure","description":"What nuclei are.","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.","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.","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.","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"}]}]}]}]},"agentConduct":{"may":["Explain the structure and properties of atomic nuclei from physics sources.","Report nuclear data from established nuclear data libraries."],"mustNot":["Help design or make nuclear weapons or radiological devices, whoever is asking.","Help acquire nuclear material outside licensed and safeguarded channels.","Overstate or understate nuclear risks when advising the public."],"requiresHuman":["Publishing analysis touching on weapons-relevant nuclear data."]},"ethics":{"considerations":["Knowledge of nuclei has given medicine and energy as well as weapons.","Public fear and misinformation about nuclear science both cause harm."],"affectedParties":["The public","Workers in nuclear industries","Patients in nuclear medicine"]},"owners":{"steward":"Nobody: a natural structure; regulators control nuclear materials.","roles":[],"masterSystems":["Nuclear data libraries"]},"relations":[{"target":"Q28729554","type":"parent","note":"registry parent class"},{"target":"Q587553","type":"parent","note":"registry parent class"},{"target":"Q908049","type":"parent","note":"registry parent class"},{"target":"bound state","type":"related","note":"category"},{"target":"charged particle","type":"related","note":"category"},{"target":"mass number","type":"related","note":"quantity"},{"target":"radiation","type":"related","note":"in decay"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.atomic-nucleus","Wikidata: Q37147 (https://www.wikidata.org/wiki/Q37147)"]},"properties":{"applicability":"not-applicable","items":["radius: about 1-10 fm - depending on mass number"]},"recognition":{"applicability":"optional","items":["Protons and neutrons","Far smaller than the atom","Electrons form the surrounding cloud","Not visible; a region about 10^-15 to 10^-14 metres across."]},"capabilities":{"applicability":"required","items":["explain nuclear composition and forces","compute binding energy and stability trends","explain fission, fusion and decay at a general level","describe exotic nuclei"]},"hazards":{"applicability":"required","items":["Providing weapons-relevant detail","Confusing nuclear and chemical processes","Misstating radiation risks"]},"interfaces":{"applicability":"required","items":["IUPAC and IUPAP nomenclature","Nuclear safety and non-proliferation regulations"]},"context":{"applicability":"required","items":["Nuclear physics, chemistry and energy.","stable nuclei","radioactive nuclei","exotic nuclei such as halo nuclei","hypernuclei","light nuclei such as the hydron and helion"]}},"sources":[{"title":"Wikidata item Q37147: atomic nucleus","url":"https://www.wikidata.org/wiki/Q37147","note":"identity and sense of the item"},{"title":"Wikipedia: Atomic nucleus","url":"https://en.wikipedia.org/wiki/Atomic_nucleus","note":"general description of the item"}],"openQuestions":["Should nuclear reactions be a separate entry?","How should nuclear data tables be linked?","How should safety guidance be linked?"],"resources":{"spec":"/models/things/publications/thing-q37147/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q37147/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T16:05:29Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:59+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}