Homestake experiment
E727970
The Homestake experiment was a pioneering underground neutrino observatory that first detected solar neutrinos and revealed the solar neutrino problem, profoundly influencing particle physics and astrophysics.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Homestake experiment canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8363287 — 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: Homestake experiment Context triple: [Raymond Davis Jr., knownFor, Homestake experiment]
-
A.
Kamiokande experiment
The Kamiokande experiment was a pioneering Japanese neutrino observatory that provided key evidence for solar and atmospheric neutrinos, contributing to the discovery of neutrino oscillations.
-
B.
Sanford Underground Research Facility
The Sanford Underground Research Facility is a deep underground laboratory in South Dakota that hosts major particle physics and astrophysics experiments, including serving as the far-site for the DUNE neutrino project.
-
C.
Sudbury Neutrino Observatory
The Sudbury Neutrino Observatory is a deep underground Canadian physics facility that made landmark measurements of solar neutrinos, providing key evidence for neutrino oscillations and mass.
-
D.
DUNE experiment
The DUNE experiment is a major international neutrino physics project designed to study neutrino oscillations, matter–antimatter asymmetry, and proton decay using intense neutrino beams and massive underground detectors.
-
E.
Ives–Stilwell experiment
The Ives–Stilwell experiment is a classic test of special relativity that measured the relativistic Doppler effect to confirm time dilation for fast-moving ions.
- 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: Homestake experiment Target entity description: The Homestake experiment was a pioneering underground neutrino observatory that first detected solar neutrinos and revealed the solar neutrino problem, profoundly influencing particle physics and astrophysics.
-
A.
Kamiokande experiment
The Kamiokande experiment was a pioneering Japanese neutrino observatory that provided key evidence for solar and atmospheric neutrinos, contributing to the discovery of neutrino oscillations.
-
B.
Sanford Underground Research Facility
The Sanford Underground Research Facility is a deep underground laboratory in South Dakota that hosts major particle physics and astrophysics experiments, including serving as the far-site for the DUNE neutrino project.
-
C.
Sudbury Neutrino Observatory
The Sudbury Neutrino Observatory is a deep underground Canadian physics facility that made landmark measurements of solar neutrinos, providing key evidence for neutrino oscillations and mass.
-
D.
DUNE experiment
The DUNE experiment is a major international neutrino physics project designed to study neutrino oscillations, matter–antimatter asymmetry, and proton decay using intense neutrino beams and massive underground detectors.
-
E.
Ives–Stilwell experiment
The Ives–Stilwell experiment is a classic test of special relativity that measured the relativistic Doppler effect to confirm time dilation for fast-moving ions.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
neutrino observatory
ⓘ
solar neutrino experiment ⓘ underground physics experiment ⓘ |
| alsoKnownAs |
Davis experiment
NERFINISHED
ⓘ
Homestake Mine experiment NERFINISHED ⓘ |
| argonCountingMethod | low-background proportional counters ⓘ |
| associatedLaureate | Raymond Davis Jr. NERFINISHED ⓘ |
| collaborator | John N. Bahcall NERFINISHED ⓘ |
| dataCollectionMethod | periodic extraction of argon-37 ⓘ |
| depth | about 1,478 meters underground ⓘ |
| detectedParticle | electron neutrino ⓘ |
| detectedSource | Sun NERFINISHED ⓘ |
| detectionReaction | ν_e + 37Cl → 37Ar + e− ⓘ |
| endDateApprox | 1990s ⓘ |
| endYearApprox | 1994 ⓘ |
| fundedBy |
U.S. Department of Energy
NERFINISHED
ⓘ
U.S. National Science Foundation NERFINISHED ⓘ |
| hostRock | gold mine ⓘ |
| inferredPhenomenon |
neutrino flavor change
ⓘ
neutrino oscillations ⓘ |
| influenced |
GALLEX experiment
NERFINISHED
ⓘ
Kamiokande experiment NERFINISHED ⓘ SAGE experiment NERFINISHED ⓘ Sudbury Neutrino Observatory NERFINISHED ⓘ Super-Kamiokande NERFINISHED ⓘ |
| legacy | established solar neutrino astronomy as a field ⓘ |
| locatedIn |
Homestake Mine
NERFINISHED
ⓘ
Lead, South Dakota NERFINISHED ⓘ |
| locatedInCountry |
United States of America
ⓘ
surface form:
United States
|
| measuredQuantity | solar neutrino flux ⓘ |
| measuredUnit | solar neutrino units (SNU) ⓘ |
| nobelPrizeConnection | contributed to 2002 Nobel Prize in Physics ⓘ |
| notableResult |
discovery of solar neutrino deficit
ⓘ
first detection of solar neutrinos ⓘ formulation of the solar neutrino problem ⓘ |
| observedFluxRelativeToTheory | about one-third of predicted value ⓘ |
| principalInvestigator | Raymond Davis Jr. NERFINISHED ⓘ |
| purpose | to detect solar electron neutrinos via inverse beta decay on chlorine ⓘ |
| researchField |
astroparticle physics
ⓘ
neutrino physics ⓘ solar physics ⓘ |
| startDate | late 1960s ⓘ |
| startYearApprox | 1967 ⓘ |
| tankContent | perchloroethylene cleaning fluid ⓘ |
| tankVolume | about 380,000 liters ⓘ |
| theoreticalModelCompared | standard solar model ⓘ |
| usedDetectorType | chlorine-based radiochemical detector ⓘ |
| usedTargetIsotope | chlorine-37 ⓘ |
| usedTargetMaterial | perchloroethylene ⓘ |
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: Homestake experiment Description of subject: The Homestake experiment was a pioneering underground neutrino observatory that first detected solar neutrinos and revealed the solar neutrino problem, profoundly influencing particle physics and astrophysics.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.