title: Mathematical approach to determine the linear attenuation coefficient without collimator in gamma-ray spectrometry.
abstract: The linear attenuation coefficient is an important factor in the correction of self-attenuation. In this study, a cone beam from a source of ∼1 μCi was utilised, not equipped with the collimator, and a complete geometric configuration was mathematically modelled. Samples of NaCl, Na2CO3 and (NH4)2SO4 were used to verify the mathematical model. The linear attenuation coefficient can be calculated within ∼4 % of difference in the cylindrical sample at energies of 59.5, 121.8, 244.7, 344.2 and 444.0 keV.
authors.affiliation: Department of Radiation Measurement and Radiation Safety, University of Science and Technology (UST), 62 Gwahak-ro, Yuseong-gu, Daejeon 305-338, Republic of Korea.
authors.forename: Chang-Jong
authors.initials: CJ
authors.lastname: Kim
authors.forename: Yoon-Hae
authors.initials: YH
authors.lastname: Cho
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Byun
authors.forename: Ju-Yong
authors.initials: JY
authors.lastname: Yun
mesh_terms: D000645:Ammonium Sulfate / Q000737:chemistry*; D002254:Carbonates / Q000737:chemistry*; D005720:Gamma Rays; D008962:Models, Theoretical; D017785:Photons; D012542:Scattering, Radiation; D012965:Sodium Chloride / Q000737:chemistry*; D013051:Spectrometry, Gamma / Q000295:instrumentation*
chemical_list: D002254:Carbonates; D012965:Sodium Chloride; C005686:sodium carbonate; D000645:Ammonium Sulfate