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10-39

direction distribution of cross section

URNurn:iso:std:iso:80000:-10:ed-2:en:item:10-39

https://metanorma.github.io/isq-smart/quantities/part-10/t10-39
urn:iso:std:iso:80000:-10:ed-2:en:item:10-39

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-10:ed-2:en:item:10-39

IEC

urn:iec:std:iec:80000-10:2019:::item:10-39

Designations

ENdirection distribution of cross section

FRdistribution directionnelle de la section efficace

Symbol

σ_{Ω}

Notation systems

Rendered

σ_{Ω}

AsciiMath

sigma_(ii(Omega))

LaTeX

\sigma_{\mathit{\Omega}}

Definition

differential quotient of $σ$ with respect to $Ω$ , where $σ$ is the cross section (cross section <atomic physics>) for ejecting or scattering a particle into a specified direction, and $Ω$ is the solid angle (ISO 80000-3: Space and time) around that direction:

σ_{Ω} = d σ / d Ω

quotient différentiel de $σ$ par rapport à $Ω$ , où $σ$ est la section efficace (cross section <atomic physics>) pour l'émission ou la diffusion d'une particule dans une direction spécifiée, et $Ω$ est l'angle solide (ISO 80000-3: Space and time) autour de cette direction:

σ_{Ω} = d σ / d Ω

Units

m^{2} \cdot s r^{- 1}

square metre per steradian

View related quantities →

m^{2}

square metre

View related quantities →

Notes

Quantities listed under direction distribution of cross section <atomic physics>, energy distribution of cross section <atomic physics> and direction and energy distribution of cross section <atomic physics> are sometimes called differential cross sections.

The type of interaction needs to be specified.

Les grandeurs indiquées en direction distribution of cross section <atomic physics>, energy distribution of cross section <atomic physics> et direction and energy distribution of cross section <atomic physics> sont parfois appelées sections efficaces différentielles.

Le type d'interaction doit être spécifié.

Referenced by

direction distribution of cross section <atomic physics>

Concept HierarchyPendrill (2024)

L²L² quantitiesLevel 0 · Kind

Broader concepts

◇ L² quantities

Ontology
isq:Quantity smart:TermEntry

Class Hierarchy

smart:Entity smart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t10-39

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	10-39
skosxl:prefLabel	"direction distribution of cross section <atomic physics>"@en
skosxl:altLabel	"sigma_(ii(Omega))"@en
skos:definition	differential quotient of stem:[sigma] with respect to stem:[ii(Omega)], where stem:[sigma] is the cross section (<<t10-3…
skos:note	Quantities listed under <<t10-39>>, <<t10-40>> and <<t10-41>> are sometimes called differential cross sections. The typ…
isq:hasUnit	m^2*sr^(-1) (square metre per steradian)m^2 (square metre)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-10

Related Entities

isq:QuantityShape isq:part-10 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry