AtomicLevel

Atomic energy levels.

represents an entity of type "AtomicLevel".

[prop]

gives the value of a specified property.

[{prop_i,…}]

gives the value of a list of properties.

represents a class of entities with values of prop_i defined by spec_i.

Sample Entities

	ElectronConfiguration	electron shell occupation numbers
	ElectronConfigurationString	electron configuration
	Element	element
	Energy	energy
	EntityClasses	entity classes
	EntityTypeList	entity type list
	IonizationLevel	ionization level
	Isotope	isotope
	JValue	J value
	Name	name
	NISTIdentificationNumber	NIST identification number
	OrbitalL	azimuthal quantum number
	Parity	parity
	PrincipalN	principal quantum number
	QuantumNumbers	quantum numbers
	SpinS	spin quantum number
	TermSymbol	term symbol
	Wavenumber	wavenumber

"AtomicLevel" entities consist of energy levels for elements and isotopes.
"AtomicLevel" entity classes include groupings of neutral and ionized elements and isotopes.
Some properties are available for the "AtomicLevel" entity type as a whole and can be given using the form EntityValue["AtomicLevel",property]. Such properties include:

	"Properties"	the list of available properties
	"PropertyCanonicalNames"	the standard names of available properties
	"SampleEntities"	a sample list of available entities (typically of length 10)
	"SampleEntityClasses"	a sample list of available entity classes (typically of length 10)
	"EntityCount"	number of entities available
	"Entities"	the list of available entities
	"EntityCanonicalNames"	the standard names of available entities
	"EntityClasses"	the list of available entity classes
	"EntityClassCanonicalNames"	the standard names of available entity classes
	"PropertyClasses"	the list of available property classes
	"PropertyClassCanonicalNames"	the standard names of available property classes
	"PropertyCount"	number of properties available

The following annotations can be used in the third argument of EntityValue["AtomicLevel",property,annotation]:

	"Source"	source information for the property
	"Date"	the date associated with the entity-property value (if any)
	"EntityAssociation"	an association of entities and entity-property values
	"PropertyAssociation"	an association of properties and entity-property values
	"EntityPropertyAssociation"	an association in which the specified entities are keys, and values are a nested association of properties and entity-property values
	"PropertyEntityAssociation"	an association in which the specified properties are keys, and values are a nested association of entities and entity-property values
	"Dataset"	a dataset in which the specified entities are keys, and values are an association of property names and entity-property values

The following annotations can be used in the second argument of EntityValue[property,annotation]:

	"Qualifiers"	the list of possible qualifiers for the property
	"QualifierValues"	the list of possible values that can be given to each qualifier
	"DefaultQualifierValues"	the list of default values for the property's qualifiers
	"Description"	a brief textual description of the property
	"Definition"	a detailed textual definition of the property
	"PhysicalQuantity"	the physical quantity associated with the entity-property value
	"Unit"	the unit associated with the entity-property value

A qualifier value of Automatic indicates that an applicable format of values can be used; e.g. for the "Date" qualifier, this includes a proper date or date span.

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Use SpectralLineData for entity discovery by locating atomic levels by energy:

Retrieve all entities for an ion:

Find an atomic level based on its element and quantum numbers:

Find a property value for an entity:

Retrieve a dataset of all available properties for an entity:

Explore the distribution of energies for the possible atomic states of tungsten:

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