Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (3): 30202-030202.doi: 10.11889/j.0253-3219.2017.hjs.40.030202

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Monte Carlo simulations of gamma ray linear attenuation coefficient function and determination of its parameters

ZHENG Honglong1,2, TUO Xianguo1,3,4, SHI Rui1,3,4, WANG Qibiao1,4, ZHANG Guiyu1, HAN Qiang1,3   

  1. 1. College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China;
    2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;
    3. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China;
    4. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
  • Received:2016-11-14 Revised:2017-02-14 Online:2017-03-10 Published:2017-03-11
  • Supported by:

    Supported by National Natural Science Foundation of China (No.41374130, No.41604154), Science and Technology Program of Sichuan (No.2017GZ0362), Sichuan Civil-military Integration Industrial Development Special Fund (No.15zs9101)

Abstract:

Background: With low and intermediate level density sample, linear attenuation coefficient is mainly determined by gamma ray energy and material density. Purpose: The aim is to determine the relationships and effect of gamma ray energy and material density to linear attenuation coefficient. Methods: This work has constructed different samples with different densities from 0.3 g·cm-3 to 3.0 g·cm-3 by using Monte Carlo N Particle Transport Code (MCNP). Linear attenuation coefficients are obtained for gamma ray energies from 100 keV to 1 500 keV. Relationships and effect of gamma ray energy and material density to linear attenuation coefficient are determined by using a function model. Through experimental measurement of 137Cs and 60Co, linear attenuation coefficients are obtained for gamma ray energies 661.661 keV, 1 173.238 keV, 1 332.513 keV in different samples with densities from 1.0 g·cm-3 to 2.7 g·cm-3. Results: Relative deviations of linear attenuation coefficients between experimental and MCNP simulation results are less than 7%. Conclusion: Simulation results are in good agreement with experimental measurement data. Linear attenuation coefficient function accurately reveals relationships and effect of gamma ray energy and material density to linear attenuation coefficient.

Key words: Nuclear waste, Monte Carlo, Gamma ray, Linear attenuation coefficient, Function

CLC Number: 

  • TL814