@prefix isq: .
@prefix smart: .
@prefix rdf: .
@prefix dcterms: .
@prefix skos: .
a isq:Entry ;
rdf:type isq:Quantity ;
rdf:type smart:TermEntry ;
dcterms:identifier "10-87" ;
skosxl:prefLabel "mass energy-transfer coefficient"@en ;
skosxl:altLabel "mu_\"tr\"//rho"@en ;
skos:definition "for ionizing uncharged particles of a given type and energy, the differential quotient of stem:[R_\"tr\"] with respect to stem:[l]:\n\n[stem%unnumbered]\n++++\n(mu_\"tr\")/rho = 1/rho 1/R (\"d\"R_\"tr\")/(\"d\"l)\n++++\n\nwhere stem:[R_\"tr\"] is the mean energy (<>) that is transferred to kinetic energy (<>) of charged particles by interactions of the uncharged particles of incident radiant energy stem:[R] (<>) in traversing a distance (<>) stem:[l] in the material of density (<>) stem:[rho], divided by stem:[rho] and stem:[R]\n"@en ;
smart:hasBindingnessType "bindingness-type:normative" ;
dcterms:isPartOf ;
isq:hasUnit [
skos:notation "kg^(-1)*m^2" ;
skosxl:prefLabel "square metre per kilogram"@en
] ;
skos:note "stem:[mu_\"tr\"//rho = dot K//ii(Psi)], where stem:[dot K] is kerma rate (<>) and stem:[ii(Psi)] is energy fluence rate (<>).\n\nThe quantity:\n\n[stem%unnumbered]\n++++\nmu_\"en\"//rho = (mu_\"tr\"//rho)(1-g)\n++++\n\nwhere stem:[g] is mean fraction of the kinetic energy of the liberated charged particles that is lost in radiative processes in the material, is called mass energy-absorption coefficient.\n\nThe mass energy-absorption coefficient of a compound material depends on the stopping power of the material. Thus, its evaluation cannot, in principle, be reduced to a simple summation of the mass energy-absorption coefficient of the atomic constituents. Such a summation can provide an adequate approximation when the value of stem:[g] is sufficiently small.\n\nIn report 85a of the ICRU a definition with an equivalent meaning is given as:\n\nThe mass energy-transfer coefficient, stem:[mu_\"tr\"//rho], of a material, for uncharged particles of a given type and energy, is the quotient of stem:[\"d\"R_\"tr\"//R] by stem:[rho \"d\"l], where stem:[\"d\"R_\"tr\"] is the mean energy that is transferred to kinetic energy of charged particles by interactions of the uncharged particles of incident radiant energy stem:[R] in traversing a distance stem:[\"d\"l] in the material of density stem:[rho]:\n\n[stem%unnumbered]\n++++\n(mu_\"tr\")/rho = 1/(rho \"d\"l) (\"d\"R_\"tr\")/R.\n++++\n"@en ;
iso:urn .