title: Non-destructive porosity profile measurement of amorphous materials by gamma-ray transmission.
abstract: This work presents measurements of the total porosity of TRe soil, sandstone rocks and porous ceramic samples. For determination of the total porosity, the gamma-ray transmission method and the Archimedes method (conventional) were employed. The porosity measurement using the gamma-ray methodology has a significant advantage with respect to the conventional method due to fast and non-destructive determination, and also for supplying results with a greater spatial resolution, in relation to the heterogeneity of the porosity. The conventional methodologies provide good results only for homogeneous samples. The experimental setup for the gamma-ray transmission technique consisted of a 241Am source (5953 keV), a NaI(Tl) scintillation detector, collimators, a XYZ micrometric table and standard gamma spectrometry electronics connected to a multichannel analyzer.
authors.affiliation: UEL/Depto. Física, Universidade Estadual de Londrina, Caixa Postal 6001, 86051-990, Londrina, PR, Brazil. appoloni@uel.br
authors.forename: Carlos Roberto
authors.initials: CR
authors.lastname: Appoloni
authors.forename: Walmir Eno
authors.initials: WE
authors.lastname: Pottker
mesh_terms: D002516:Ceramics / Q000032:analysis*; D008422:Materials Testing / Q000379:methods*; D016062:Porosity; D012987:Soil / Q000032:analysis*; D013051:Spectrometry, Gamma / Q000379:methods*
chemical_list: D012987:Soil