nitrogen-13
E368990
Nitrogen-13 is a short-lived radioactive isotope of nitrogen that plays a key role as an intermediate nuclide in stellar nuclear fusion processes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| nitrogen-13 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3576653 — 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: nitrogen-13 Context triple: [Bethe–Weizsäcker cycle, involves, nitrogen-13]
-
A.
Niton
Niton is a coastal village on the southern tip of the Isle of Wight in England, known for its scenic cliffs and rural character.
-
B.
NUCL
NUCL is the abbreviation for the Division of Nuclear Chemistry and Technology, a professional body focused on research and advancement in nuclear chemistry and related technologies.
-
C.
nobelium
Nobelium is a synthetic, highly radioactive actinide element with atomic number 102, named in honor of Alfred Nobel and used primarily for scientific research.
-
D.
Niwt-Imn
Niwt-Imn is the ancient Egyptian name for the city later known as Thebes, a major religious and political center along the Nile.
-
E.
NUC
NUC is the standard abbreviation for the U.S. Navy Unit Commendation, a collective military award recognizing outstanding heroism or meritorious service by Navy units.
- 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: nitrogen-13 Target entity description: Nitrogen-13 is a short-lived radioactive isotope of nitrogen that plays a key role as an intermediate nuclide in stellar nuclear fusion processes.
-
A.
Niton
Niton is a coastal village on the southern tip of the Isle of Wight in England, known for its scenic cliffs and rural character.
-
B.
NUCL
NUCL is the abbreviation for the Division of Nuclear Chemistry and Technology, a professional body focused on research and advancement in nuclear chemistry and related technologies.
-
C.
nobelium
Nobelium is a synthetic, highly radioactive actinide element with atomic number 102, named in honor of Alfred Nobel and used primarily for scientific research.
-
D.
Niwt-Imn
Niwt-Imn is the ancient Egyptian name for the city later known as Thebes, a major religious and political center along the Nile.
-
E.
NUC
NUC is the standard abbreviation for the U.S. Navy Unit Commendation, a collective military award recognizing outstanding heroism or meritorious service by Navy units.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
beta-plus emitter
ⓘ
nitrogen isotope ⓘ radioactive isotope ⓘ radionuclide ⓘ |
| application |
PET myocardial perfusion imaging
ⓘ
metabolic imaging in nuclear medicine ⓘ positron emission tomography ⓘ |
| atomicNumber | 7 ⓘ |
| belongsToSeries | nitrogen isotopes ⓘ |
| betaPlusBranchingRatio | approximately 100 percent ⓘ |
| bindingEnergyPerNucleon | about 7.5 MeV ⓘ |
| chemicalFormInPET | 13N-ammonia ⓘ |
| decayConstant | about 1.16×10^-3 s^-1 ⓘ |
| decayEnergy | about 2.22 MeV ⓘ |
| decayMode | beta-plus decay ⓘ |
| decayProduct |
carbon-13
ⓘ
electron neutrino ⓘ positron ⓘ |
| discoveryYear | early 20th century ⓘ |
| element | nitrogen ⓘ |
| halfLife |
about 9.97 minutes
ⓘ
approximately 600 seconds ⓘ |
| massExcess | about 5.345 MeV ⓘ |
| massNumber | 13 ⓘ |
| N | 6 ⓘ |
| neutronNumber | 6 ⓘ |
| nuclearIsomericStates | none known ⓘ |
| nucleonNumber | 13 ⓘ |
| occurrence |
artificially produced in accelerators
ⓘ
produced in stars ⓘ |
| parity | - ⓘ |
| positronEndpointEnergy | about 1.20 MeV ⓘ |
| producedByReaction | 16O(p,α)13N ⓘ |
| productionMethod |
cyclotron production
ⓘ
proton irradiation of oxygen-16 ⓘ |
| QValueBetaPlus | about 2.22 MeV ⓘ |
| radiationType |
annihilation gamma rays (indirectly)
ⓘ
positron radiation ⓘ |
| radioactive | true ⓘ |
| roleInAstrophysics |
intermediate nuclide in stellar nuclear fusion
ⓘ
participant in CNO cycle ⓘ |
| safetyConsideration | short half-life limits radiation dose ⓘ |
| spin | 1/2 ⓘ |
| stability | unstable ⓘ |
| symbol | 13N ⓘ |
| usedAsTracer | yes ⓘ |
| Z | 7 ⓘ |
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: nitrogen-13 Description of subject: Nitrogen-13 is a short-lived radioactive isotope of nitrogen that plays a key role as an intermediate nuclide in stellar nuclear fusion processes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.