@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:t10-42.1>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "10-42.1" ;
  skosxl:prefLabel "volumic cross section"@en ;
  skosxl:altLabel "macroscopic cross section <atomic physics>"@en ;
  skosxl:altLabel "ii(Sigma)"@en ;
  skos:definition "product of the number density stem:[n_\"a\"] of the atoms and of the cross section (<<t10-38.1>>) stem:[sigma_\"a\"] for a given type of atoms:\n\n[stem%unnumbered]\n++++\nii(Sigma) = n_\"a\" sigma_\"a\"\n++++\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-10> ;
  isq:hasUnit [
    skos:notation "m^(-1)" ;
    skosxl:prefLabel "per metre"@en
  ] ;
  skos:note "When the target particles of the medium are at rest, stem:[ii(Sigma) = 1//l], where stem:[l] is the mean free path (<<t10-71>>)."@en ;
  iso:urn <urn:iso:std:iso:80000:-10:ed-2:en:item:10-42.1> .