الفهرس 
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Abstract
The Discrete Ordinate Method is considered as
the most accurate techniques commonly used in
the neutron transport problems. For its rather
computing times than that of the alternative
Carlo method and also because of its flexibility
different media, it has been adopted in ( thesis to ~olve the problem of the computations of
factor and the albedo of double-layered
The concept of the neutron build-up factor and
albedo-data recently used in the analysis
va,-ious practical applications in the fields of
radiation protection, design of
neutron therapy, neutron-diagnostics,
of heating in a shield and neutron-radlogauglng.
The use of the bUild-up factors can simplify the
lculations in most of the applications In . the above
fields because the neutron flux can be repre-
in a simple mathematical form which enables car-
out the succeeding calculations. Also using the
bedo-data the complicated geometry of the problems
be simplified in replacing the double layered
by neutron planar sources.
A systematic Investigation of the effect of the