COMPARATIVE STUDY ON ATTENUATION AND SCATTERING OF γ-RAYS THROUGH SEDIMENTARY AND IGNEOUS ROCKS

H. M. Mahmoud; A. S. Hok; E. Armia; A. M. Eltaher

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COMPARATIVE STUDY ON ATTENUATION AND SCATTERING OF γ-RAYS THROUGH SEDIMENTARY AND IGNEOUS ROCKS

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- COMPARATIVE STUDY ON ATTENUATION AND SCATTERING OF γ-RAYS THROUGH SEDIMENTARY AND IGNEOUS ROCKS
- 辐射研究与辐射工艺学报 Vol. 14, Issue 3, Pages: 134-142(1996)
- 作者机构：
  
  Physics Department. Faculty of Science, Qena, South Valley University, Egypt
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1996-08，
  
  Received：23 November 1995，
  
  Accepted：30 January 1996
- 稿件说明：
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H. M. Mahmoud, A. S. Hok, E. Armia, et al. COMPARATIVE STUDY ON ATTENUATION AND SCATTERING OF γ-RAYS THROUGH SEDIMENTARY AND IGNEOUS ROCKS. [J]. 辐射研究与辐射工艺学报, 1996,14(3):134-142.
DOI：

H. M. Mahmoud, A. S. Hok, E. Armia, et al. COMPARATIVE STUDY ON ATTENUATION AND SCATTERING OF γ-RAYS THROUGH SEDIMENTARY AND IGNEOUS ROCKS. [J]. 辐射研究与辐射工艺学报, 1996,14(3):134-142. DOI：

摘要

介绍沉积岩(Siltone和Conglomerate)和火成岩(andesite和felsite)的γ射线的衰减系数与散射系数的测量方法和测量结果. 四种材料均制成颗粒粗细不同的粉末

在制成样品. 颗粒的尺寸有: 0.17、0.13、0.095、0.085、0.063 nm五种. 同时也测量上述品种的天然岩石的衰减系数与散射系数. 使用

Co、

137

Cs、

133

Ba等γ射线源

能量在0.36到1.33MeV范围. 详细地研究了线性衰减系数µ

质量衰减系数µ/ρ、弛豫长度l/µ及侧边散射系数ϕ与颗粒直径d、样品密度ρ和γ射线能量是E的关系. 发现线性衰减系数与d和E成反比与ρ成正比

而侧边散射系数与d和E成正比但与ρ成反比. 比较此两大类岩石的µ和ϕ差异的原因. 实验的结果认为这些材料可用于屏蔽γ射线.

Abstract

The attenuation and scattering coefficients of gamma-rays of different energies in two sedimentary and two igneous natural rocks: siltstone

conglomerate

andesite and felsite respectively

and also in compressed powdered samples of the same four rocks

were studied. The effects of particle size （grain diameter d mm） and sample density

with radiation energy （E） ranging from 0.36 to 1.33 MeV

were investigated. The results showed an inverse proportionality between the linear attenuation coefficient µ and both d and E

also we found that µ has a direct proportionality with the sample density

ρ. The side scattering coefficient

is directly proportional to both d and E

but at the same time ϕ has an inverse proportionality with the sample density ρ.

关键词

沉积岩火成岩吸收系数边散射系数

Keywords

Sedimentary rockIgneous rockAttenuation coefficientSide scattering coefficient

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