Abstract:
(In English)
The Monte Carlo method is one of the important models of choice for
simulating photon transport. In this research, bismuth oxide nanoparticles
were synthesized through precipitation method
(microwave method)
. X
-
ray
Attenuation of
Bismuth Oxide Nano Particles has studied by Monte Carlo
Method. It is the first time to obtain a series of results for X
-
ray Attenuation
of Bismuth Oxide Nano Particles by Monte Carlo Method. These results are
the first
-
hand calculation data that may help
to understand the mechanism of
Monte Carlo Method. This thesis provides all the details necessary for
implementation of a Monte Carlo program. Variance reduction schemes that
improve the
efficiency of the Monte Carlo method are discussed.
The
study found
the
derivation of
an equation
to calculate the
mass
attenuation coefficient for
X
-
ray
in terms of
the percentage of
concentration
of the solution
instead of
the percentage of
atomic
or
molecular
weights
.
The
result which obtained from this
equation
is the
mass attenuation coefficient
of bismuth oxide nanoparticles
increased with increasing bismuth oxide
nanoparticles concentration and decreased with increased X
-
ray energy
.
The simulation results were validated by comparing them with National
Institute of St
andards and Technology (NIST) values. For narrow beam
geometry, we found a maximum difference of
-
0.58192 % for water
,
-
2.1372 %,
-
2.1031 %
and
-
2.2385% for 0.5, 1 and 2 % Bi
2
O
3
concentrations
respectively. For broad beam simulation, we found an effect
ive mass
attenuation coefficient larger the mass energy absorption coefficient and
smaller than the mass attenuation
coefficient
