Landé g-factor
E232903
The Landé g-factor is a dimensionless quantity in atomic physics that characterizes the splitting of atomic energy levels in a magnetic field by relating the total angular momentum of an electron or atom to its magnetic moment.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Landé g-factor canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T2092633 — 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: Landé g-factor Context triple: [Zeeman effect, dependsOn, Landé g-factor]
-
A.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
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B.
Huang–Rhys factor
The Huang–Rhys factor is a dimensionless parameter in solid-state and molecular spectroscopy that quantifies the strength of electron–phonon (vibronic) coupling during electronic transitions.
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C.
Bohr magneton
The Bohr magneton is a fundamental physical constant that represents the natural unit of the electron’s magnetic moment in atomic physics.
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D.
Rydberg constant
The Rydberg constant is a fundamental physical constant that characterizes the limiting value of the highest wavenumber (or lowest wavelength) of any photon that can be emitted from the hydrogen atom, playing a key role in atomic spectroscopy and quantum theory.
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E.
Stark effect
The Stark effect is the splitting and shifting of atomic or molecular spectral lines caused by an external electric field.
- 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: Landé g-factor Target entity description: The Landé g-factor is a dimensionless quantity in atomic physics that characterizes the splitting of atomic energy levels in a magnetic field by relating the total angular momentum of an electron or atom to its magnetic moment.
-
A.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
-
B.
Huang–Rhys factor
The Huang–Rhys factor is a dimensionless parameter in solid-state and molecular spectroscopy that quantifies the strength of electron–phonon (vibronic) coupling during electronic transitions.
-
C.
Bohr magneton
The Bohr magneton is a fundamental physical constant that represents the natural unit of the electron’s magnetic moment in atomic physics.
-
D.
Rydberg constant
The Rydberg constant is a fundamental physical constant that characterizes the limiting value of the highest wavenumber (or lowest wavelength) of any photon that can be emitted from the hydrogen atom, playing a key role in atomic spectroscopy and quantum theory.
-
E.
Stark effect
The Stark effect is the splitting and shifting of atomic or molecular spectral lines caused by an external electric field.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
atomic physics concept
ⓘ
dimensionless physical quantity ⓘ |
| appearsIn | Hamiltonian for atom in magnetic field ⓘ |
| appliesTo |
atomic energy levels
ⓘ
electrons in atoms ⓘ hyperfine structure levels ⓘ |
| assumes | LS coupling ⓘ |
| canBeMeasuredBy |
Zeeman effect
ⓘ
surface form:
Zeeman spectroscopy
high-resolution atomic spectroscopy ⓘ |
| canBeModifiedBy | configuration interaction ⓘ |
| characterizes | splitting of atomic energy levels in a magnetic field ⓘ |
| context | non-relativistic quantum theory of atoms ⓘ |
| dependsOn |
coupling scheme of angular momenta
ⓘ
orbital angular momentum quantum number l ⓘ spin quantum number s ⓘ total angular momentum quantum number j ⓘ |
| domain | microscopic magnetic properties of atoms ⓘ |
| field |
atomic physics
ⓘ
quantum mechanics ⓘ |
| generalizes |
orbital g-factor
ⓘ
spin g-factor ⓘ |
| hasApproximation |
Russell–Saunders coupling
ⓘ
surface form:
LS-coupling Landé formula
|
| hasFormula | g_J = 1 + [j(j+1) + s(s+1) - l(l+1)] / [2 j(j+1)] ⓘ |
| hasUnit | dimensionless ⓘ |
| isPartOf | description of Zeeman splitting pattern ⓘ |
| namedAfter | Alfred Landé ⓘ |
| relatedConcept |
electron g-factor
ⓘ
nuclear g-factor ⓘ |
| relatedTo |
Bohr magneton
ⓘ
gyromagnetic ratio ⓘ magnetic dipole moment ⓘ orbital angular momentum operator L ⓘ spin angular momentum operator S ⓘ total angular momentum operator J ⓘ |
| relates | total angular momentum to magnetic moment ⓘ |
| symbol | g_J ⓘ |
| usedIn |
electron paramagnetic resonance
ⓘ
surface form:
EPR spectroscopy
Zeeman effect ⓘ atomic clock frequency shifts ⓘ fine structure analysis ⓘ magnetic resonance ⓘ magneto-optical spectroscopy ⓘ optical pumping experiments ⓘ selection rules analysis in magnetic fields ⓘ spectroscopy ⓘ |
| usedToCalculate | magnetic moment of an atomic level ⓘ |
| usedToDescribe | energy level splitting in external magnetic fields ⓘ |
| usedToDetermine | magnetic quantum number dependent energy shifts ⓘ |
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: Landé g-factor Description of subject: The Landé g-factor is a dimensionless quantity in atomic physics that characterizes the splitting of atomic energy levels in a magnetic field by relating the total angular momentum of an electron or atom to its magnetic moment.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.