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10-44

particle fluence rate

URNurn:iso:std:iso:80000:-10:ed-2:en:item:10-44

https://metanorma.github.io/isq-smart/quantities/part-10/t10-44
urn:iso:std:iso:80000:-10:ed-2:en:item:10-44

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-10:ed-2:en:item:10-44

IEC

urn:iec:std:iec:80000-10:2019:::item:10-44

Designations

ENparticle fluence rate

FRdébit de fluence de particules

Symbol

Φ

Notation systems

Rendered

Φ

AsciiMath

ii(Phi)

LaTeX

\mathit{\Phi}

Definition

differential quotient of fluence $Φ$ (particle fluence) with respect to time (ISO 80000-3: Space and time):

Φ = \frac{d Φ}{d t}

quotient différentiel de la fluence $Φ$ (particle fluence) par rapport au temps (ISO 80000-3: Space and time):

Φ = \frac{d Φ}{d t}

Units

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

per square metre second

View related quantities →

Notes

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

The distribution function expressed in terms of speed and energy, $Φ_{ν}$ and $Φ_{E}$ , are related to by:

Φ = \int Φ_{ν} d ν = \int Φ_{E} d E .

This quantity has also been termed particle flux density. Because the word "density" has several connotations, the term "fluence rate" is preferred. For a radiation field composed of particles of velocity $ν$ , the fluence rate is equal to $n \cdot ν$ where $n$ is the particle number density.

See Remarks for particle fluence.

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

The fluence rate, $Φ$ , is the quotient of $d Φ$ and $d t$ , where $d Φ$ is the increment of the fluence in the time interval $d t$ :

Φ = \frac{d Φ}{d t}

Referenced by

particle current density diffusion coefficient for fluence rate reactor time constant

Concept HierarchyPendrill (2024)

L⁻² T⁻¹L⁻² T⁻¹ quantitiesLevel 0 · Kind

Broader concepts

◇ L⁻² T⁻¹ quantities

Characterizes

● proton

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:t10-44

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	10-44
skosxl:prefLabel	"particle fluence rate"@en
skosxl:altLabel	"ii(Phi)"@en
skos:definition	differential quotient of fluence stem:[ii(Phi)] (<<t10-43>>) with respect to time (<<iso80000-3>>): [stem%unnumbered] +…
skos:note	The word "particle" is usually replaced by the name of a specific particle, for example proton fluence rate. The distri…
isq:hasUnit	m^(-2)*s^(-1) (per square metre second)
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