Attenuation Parameters and Effective Atomic Numbers of Concretes Containing Pumice for Some Photon Energies by Experiment, Simulation and Calculation

Yıl 2018, , 90 - 95, 31.12.2018

Hakan Akyıldırım

https://doi.org/10.31590/ejosat.454777

Cited By: 3

Öz

Photon mass attenuation coefficients and
effective atomic numbers for three types of concretes containing pumice mineral
in different rates (namely 0%, 50% and 100%) were studied by photon
transmission experiments, by simulations and by theoretical calculations. Experimental
procedure was realized by using a 3ʺ×3ʺ NaI(Tl) connected to a 16k multichannel
analyzer detector system for 511, 835 and 1275 keV photon energies. In
simulations, Geant4 Monte Carlo simulation toolkit was used to estimate the
total mass attenuation coefficients via total linear attenuation coefficients.
For theoretical calculations, web version of XCOM code was used at 1 keV – 100
GeV energy region for comparison. Also, mean free paths and half value layer
thicknesses of concretes were calculated at this energies by means of
attenuation coefficients obtained by three methods. Results from each method
were found to be in a reasonably good agreement. Besides, it was concluded that
addition of heavy weight elements to concrete effected attenuation parameters
positively.

Anahtar Kelimeler

Photon attenuation, effective atomic numbers, Geant4, XCOM, pumice concrete

Attenuation Parameters and Effective Atomic Numbers of Concretes Containing Pumice for Some Photon Energies by Experiment, Simulation and Calculation

Öz

Photon mass attenuation
coefficients (µ) and effective atomic
numbers (Z_eff) of three types
of concretes containing pumice mineral in different rates (0%, 50% and 100%)
were studied by photon transmission experiments and by simulations for 511, 835
and 1275 keV energies. Experimental procedure was realized by using a 3ʺ×3ʺ
NaI(Tl) connected to a 16k multichannel analyzer detector system. In
simulations, Geant4 Monte Carlo simulation toolkit was used to estimate the
total mass attenuation coefficients. For theoretical calculations, web version
of XCOM code was used at 1 keV – 100 GeV energy region for comparison. Also, mean
free paths and half value layer thicknesses of concretes were calculated at
this energies by means of attenuation coefficients obtained by three methods. Results
from each method were found to be in a reasonably good agreement.

Anahtar Kelimeler

Photon attenuation, effective atomic numbers, Geant4, XCOM, pumice concrete

Kaynakça

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