@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t10-31>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "10-31" ;
  skosxl:prefLabel "half life"@en ;
  skosxl:altLabel "T_(1//2)"@en ;
  skos:definition "mean duration (<<iso80000-3>>) required for the decay of one half of the atoms or nuclei"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-10> ;
  isq:hasUnit [
    skos:notation "s" ;
    skosxl:prefLabel "second"@en
  ] ;
  skos:note "For exponential decay, stem:[T_(1//2) = (\"ln\"2)//lambda], where stem:[lambda] is the decay constant (<<t10-24>>)."@en ;
  iso:urn <urn:iso:std:iso:80000:-10:ed-2:en:item:10-31> .