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10-69

lethargy

URNurn:iso:std:iso:80000:-10:ed-2:en:item:10-69

https://metanorma.github.io/isq-smart/quantities/part-10/t10-69
urn:iso:std:iso:80000:-10:ed-2:en:item:10-69

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-10:ed-2:en:item:10-69

IEC

urn:iec:std:iec:80000-10:2019:::item:10-69

Designations

ENlethargy

FRléthargie

Symbol

u

Notation systems

Rendered

u

AsciiMath

u

LaTeX

u

Definition

for a neutron of kinetic energy $E$ (ISO 80000-4: Mechanics):

u = ln (E_{0} / E),

where $E_{0}$ is a reference energy

pour un neutron d'énergie cinétique $E$ (ISO 80000-4: Mechanics) :

u = ln (E_{0} / E),

où $E_{0}$ est une énergie de référence

Units

1

one

View related quantities →

Notes

Lethargy is also referred to as logarithmic energy decrement.

La léthargie est également appelée décrément logarithmique de l'énergie.

Referenced by

average logarithmic energy decrement

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

Characterizes

● neutron

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:t10-69

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	10-69
skosxl:prefLabel	"lethargy"@en
skosxl:altLabel	"u"@en
skos:definition	for a neutron of kinetic energy stem:[E] (<<iso80000-4>>): [stem%unnumbered] ++++ u = "ln"(E_0//E), ++++ where stem:[E…
skos:note	Lethargy is also referred to as logarithmic energy decrement.
isq:hasUnit	1 (one)
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