Author/Authors :
Bashter، نويسنده , , I. I، نويسنده ,
Abstract :
Theoretical calculations have been performed in order to obtain the
mass attenuation coefficients and the linear attenuation coefficients at photon
energies from 10 keY to 1 GeV for ordinary, hematite-serpentine, ilmenitelimonite,
basalt-magnetite, ilmenite, steel-scrap and steel-magnetite concretes.
The concrete densities ranged from 2.3 to 5.11 gcm-3 . The calculated values of
linear attenuation coefficients have been compared with those measured at
gamma ray energies from 1.5 to 6 MeV for the concretes under investigation.
Agreement between measured and calculated values has been obtained. Also,
the fast neutron effective macroscopic removal cross-sections for the seven
types of concrete have been calculated using the elemental composition of the
mixes. Comparison between the measured and calculated effective removal
cross-section values show a reasonable agreement for all types of concrete.
Steel-magnetite concrete of high density (5.11 gcm-3), and with constituents
of relatively high atomic number, is an effective shield for both photons and
neutrons.
