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10-43

particle fluence

URNurn:iso:std:iso:80000:-10:ed-2:en:item:10-43

https://metanorma.github.io/isq-smart/quantities/part-10/t10-43
urn:iso:std:iso:80000:-10:ed-2:en:item:10-43

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-10:ed-2:en:item:10-43

IEC

urn:iec:std:iec:80000-10:2019:::item:10-43

Designations

ENparticle fluence

FRfluence de particules

Symbol

Φ

Notation systems

Rendered

Φ

AsciiMath

ii(Phi)

LaTeX

\mathit{\Phi}

Definition

differential quotient of $N$ with respect to $a$ , where $N$ is the number of particles incident on a sphere of cross-sectional area $a$ (cross section <atomic physics>):

Φ = \frac{d N}{d a}

quotient différentiel de $N$ par rapport à $a$ , où $N$ est le nombre de particules incidentes sur une sphère ayant une aire de section efficace $a$ (cross section <atomic physics>):

Φ = \frac{d N}{d a}

Units

m^{- 2}

per square metre

View related quantities →

Notes

The word "particle" is usually replaced by the name of a specific particle, for example _proton_ fluence.

If a flat area of size $d A$ is passed perpendicularly by a number of $d N$ particles, the corresponding particle fluence is: $Φ = \frac{d N}{d A}$

A plane area of size $d A$ crossed at an angle $α$ with respect to the surface normal by a number of $d N$ particles results in the particle fluence:

Φ = \frac{d N}{cos (α) d A}

In report 85a of the ICRU a definition with an equivalent meaning is given as:

The fluence, $Φ$ , is the quotient of $d N$ and $d a$ , where $d N$ is the number of particles incident on a sphere of cross-sectional area $d a$ :

Φ = \frac{d N}{d a}

Referenced by

cross section <atomic physics>particle fluence rate energy imparted

Concept HierarchyPendrill (2024)

L⁻²L⁻² quantitiesLevel 0 · Kind

Broader concepts

◇ L⁻² 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:t10-43

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	10-43
skosxl:prefLabel	"particle fluence"@en
skosxl:altLabel	"ii(Phi)"@en
skos:definition	differential quotient of stem:[N] with respect to stem:[a], where stem:[N] is the number of particles incident on a sphe…
skos:note	The word "particle" is usually replaced by the name of a specific particle, for example _proton_ fluence. If a flat are…
isq:hasUnit	m^(-2) (per 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