Bethe–Feynman formula for nuclear explosions
E75708
The Bethe–Feynman formula for nuclear explosions is a theoretical expression developed by Hans Bethe and Richard Feynman that estimates the energy yield and behavior of nuclear detonations based on fundamental physical parameters of the device.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Bethe–Feynman formula for nuclear explosions canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T604345 — 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: Bethe–Feynman formula for nuclear explosions Context triple: [Hans Bethe, notableIdea, Bethe–Feynman formula for nuclear explosions]
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A.
Frisch–Peierls memorandum
The Frisch–Peierls memorandum was a pivotal 1940 document by physicists Otto Frisch and Rudolf Peierls that first outlined the feasibility of a small, practical uranium-based atomic bomb, helping to catalyze British and later Allied nuclear weapons research.
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B.
MAUD Report
The MAUD Report was a secret 1941 British scientific assessment that concluded an atomic bomb was feasible and helped spur the U.S. Manhattan Project.
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C.
Oppenheimer–Phillips process
The Oppenheimer–Phillips process is a nuclear reaction mechanism in which a deuteron interacting with a target nucleus effectively transfers its neutron while the proton is repelled, enabling certain reactions to occur at lower energies than would otherwise be required.
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D.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
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E.
Chicago Pile-1
Chicago Pile-1 was the world’s first artificial nuclear reactor, achieving the first controlled, self-sustaining nuclear chain reaction in 1942 under the leadership of Enrico Fermi.
- 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: Bethe–Feynman formula for nuclear explosions Target entity description: The Bethe–Feynman formula for nuclear explosions is a theoretical expression developed by Hans Bethe and Richard Feynman that estimates the energy yield and behavior of nuclear detonations based on fundamental physical parameters of the device.
-
A.
Frisch–Peierls memorandum
The Frisch–Peierls memorandum was a pivotal 1940 document by physicists Otto Frisch and Rudolf Peierls that first outlined the feasibility of a small, practical uranium-based atomic bomb, helping to catalyze British and later Allied nuclear weapons research.
-
B.
MAUD Report
The MAUD Report was a secret 1941 British scientific assessment that concluded an atomic bomb was feasible and helped spur the U.S. Manhattan Project.
-
C.
Oppenheimer–Phillips process
The Oppenheimer–Phillips process is a nuclear reaction mechanism in which a deuteron interacting with a target nucleus effectively transfers its neutron while the proton is repelled, enabling certain reactions to occur at lower energies than would otherwise be required.
-
D.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
-
E.
Chicago Pile-1
Chicago Pile-1 was the world’s first artificial nuclear reactor, achieving the first controlled, self-sustaining nuclear chain reaction in 1942 under the leadership of Enrico Fermi.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
nuclear weapons theory concept
ⓘ
physical formula ⓘ theoretical model ⓘ |
| appliesTo |
fission weapons
ⓘ
nuclear device yield estimation ⓘ nuclear explosions ⓘ |
| approximationType | simplified analytic approximation ⓘ |
| assumes |
homogeneous fissile core
ⓘ
rapidly varying neutron population ⓘ spherical symmetry of the core ⓘ |
| basedOn |
chain reaction kinetics
ⓘ
exponential growth of fission power ⓘ neutron transport theory ⓘ |
| characterizes |
exponential growth phase of a nuclear explosion
ⓘ
time to disassembly of the core ⓘ |
| describes |
behavior of nuclear detonations
ⓘ
energy yield of nuclear detonations ⓘ time evolution of nuclear explosion power ⓘ |
| developedAt | Los Alamos Laboratory ⓘ |
| developedBy |
Hans Bethe
ⓘ
Richard Feynman ⓘ |
| developedDuring | Manhattan Project ⓘ |
| estimates |
fraction of material fissioned
ⓘ
power as a function of time ⓘ total explosive yield ⓘ |
| field |
nuclear physics
ⓘ
weapons physics ⓘ |
| historicalSignificance | one of the first systematic yield estimation formulas for nuclear weapons ⓘ |
| involves | coupled neutron and hydrodynamic behavior ⓘ |
| namedAfter |
Hans Bethe
ⓘ
Richard Feynman ⓘ |
| purpose |
guide nuclear weapon design calculations
ⓘ
predict nuclear weapon yield ⓘ |
| relatedTo |
critical mass
ⓘ
neutron diffusion equation ⓘ nuclear chain reaction ⓘ point‑kinetics approximation ⓘ supercritical assembly ⓘ |
| usedIn | early nuclear weapon design studies ⓘ |
| usesParameter |
degree of supercriticality
ⓘ
density of fissile core ⓘ fission energy per event ⓘ mass of fissile material ⓘ multiplication factor k ⓘ neutron absorption in non‑fission reactions ⓘ neutron generation time ⓘ neutron leakage ⓘ |
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: Bethe–Feynman formula for nuclear explosions Description of subject: The Bethe–Feynman formula for nuclear explosions is a theoretical expression developed by Hans Bethe and Richard Feynman that estimates the energy yield and behavior of nuclear detonations based on fundamental physical parameters of the device.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.