Hoyle state of carbon-12
E884524
The Hoyle state of carbon-12 is an excited nuclear energy level crucial for the formation of carbon in stars, enabling the synthesis of heavier elements necessary for life.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Hoyle state of carbon-12 canonical | 1 |
| carbon-12 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10756891 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Hoyle state of carbon-12 Context triple: [triple-alpha process, dependsOn, Hoyle state of carbon-12]
-
A.
Queen of Carbon
Queen of Carbon is the nickname of physicist Mildred Dresselhaus, renowned for her pioneering research on the electronic properties of carbon materials such as graphite, fullerenes, and carbon nanotubes.
-
B.
Carbost
Carbost is a small village on the Isle of Skye in Scotland, known for its scenic setting on Loch Harport and as the home of the Talisker whisky distillery.
-
C.
The O2 complex
The O2 complex is a large entertainment district in London featuring the O2 Arena, cinemas, restaurants, bars, and various leisure and retail facilities housed under the iconic dome structure.
-
D.
The Metamict State
The Metamict State is a poem by chemist and Nobel laureate Roald Hoffmann that reflects on the structural disorder and transformation of materials as a metaphor for human experience.
-
E.
Honeycomb
"Honeycomb" is a popular 1957 pop song recorded by American singer Jimmie Rodgers that became one of his signature hits.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Hoyle state of carbon-12 Target entity description: The Hoyle state of carbon-12 is an excited nuclear energy level crucial for the formation of carbon in stars, enabling the synthesis of heavier elements necessary for life.
-
A.
Queen of Carbon
Queen of Carbon is the nickname of physicist Mildred Dresselhaus, renowned for her pioneering research on the electronic properties of carbon materials such as graphite, fullerenes, and carbon nanotubes.
-
B.
Carbost
Carbost is a small village on the Isle of Skye in Scotland, known for its scenic setting on Loch Harport and as the home of the Talisker whisky distillery.
-
C.
The O2 complex
The O2 complex is a large entertainment district in London featuring the O2 Arena, cinemas, restaurants, bars, and various leisure and retail facilities housed under the iconic dome structure.
-
D.
The Metamict State
The Metamict State is a poem by chemist and Nobel laureate Roald Hoffmann that reflects on the structural disorder and transformation of materials as a metaphor for human experience.
-
E.
Honeycomb
"Honeycomb" is a popular 1957 pop song recorded by American singer Jimmie Rodgers that became one of his signature hits.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
energy level of carbon-12
ⓘ
excited nuclear state ⓘ resonance state ⓘ |
| belongsTo | spectrum of carbon-12 energy levels ⓘ |
| enablesProcess | efficient triple-alpha fusion in stars ⓘ |
| hasAtomicNumber | 6 ⓘ |
| hasConfiguration | three-alpha cluster state ⓘ |
| hasDecayMode |
decay into three alpha particles
ⓘ
gamma decay to excited states of carbon-12 ⓘ gamma decay to the ground state of carbon-12 ⓘ |
| hasEnergyAbove3AlphaThreshold | about 0.38 MeV above the triple-alpha threshold ⓘ |
| hasExcitationEnergy |
about 7.65 MeV above the ground state of carbon-12
ⓘ
approximately 7.654 MeV above the ground state of carbon-12 ⓘ |
| hasIsospin | 0 ⓘ |
| hasLifetime | about 10^-16 seconds ⓘ |
| hasMassNumber | 12 ⓘ |
| hasNucleus |
carbon-12
ⓘ
linked to:
Hoyle state of carbon-12
|
| hasParity | positive parity ⓘ |
| hasQuantumNumbers | J^π = 0+ , T = 0 ⓘ |
| hasSelectionRules | E2 and E0 gamma transitions to lower states ⓘ |
| hasSpin | 0 ⓘ |
| hasSpinParity | 0+ ⓘ |
| hasStructureModel |
Bose–Einstein condensate–like alpha gas
ⓘ
alpha-cluster model ⓘ |
| hasWidth | about 8.5 eV ⓘ |
| isAbove |
first excited 2+ state of carbon-12
ⓘ
ground state of carbon-12 ⓘ |
| isCrucialFor |
formation of carbon-based life
ⓘ
stellar nucleosynthesis of carbon ⓘ |
| isImportantFor |
chemical evolution of galaxies
ⓘ
synthesis of heavier elements than helium in stars ⓘ |
| isKeyExampleOf | fine-tuning in nuclear physics ⓘ |
| isMeasuredUsing |
inelastic alpha scattering
ⓘ
inelastic electron scattering ⓘ nuclear reaction experiments such as 12C(α,α')12C* ⓘ |
| isNamedAfter | Fred Hoyle ⓘ |
| isNear | three-alpha breakup threshold ⓘ |
| isPartOf | carbon-12 nucleus ⓘ |
| isPopulatedBy |
fusion of three helium-4 nuclei
ⓘ
sequential capture of alpha particles on beryllium-8 ⓘ |
| isResonanceIn | triple-alpha process ⓘ |
| isStudiedIn |
cluster models of nuclei
ⓘ
nuclear astrophysics ⓘ |
| occursIn |
helium-burning cores of massive stars
ⓘ
helium-burning red giant stars ⓘ |
| wasDiscoveredBy | nuclear spectroscopy experiments ⓘ |
| wasFirstObservedIn | 1950s ⓘ |
| wasPredictedBy | Fred Hoyle ⓘ |
| wasPredictedFrom | observed cosmic abundance of carbon ⓘ |
| wasPredictedInContextOf | anthropic reasoning about carbon abundance ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Hoyle state of carbon-12 Description of subject: The Hoyle state of carbon-12 is an excited nuclear energy level crucial for the formation of carbon in stars, enabling the synthesis of heavier elements necessary for life.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Hoyle state of carbon-12