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Simulate
and Study the Effect of Compton Scattering Angle on the
Radiography Inspection |
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Radiography
inspection have been used in this work to detects and image the
corrosion in the outside surface of the pipe. Gamma ray with
0.662 MeV from 127Cs source have been chosen for this inspection
while NaI(Tl) detector is use to detect and collect the scatter
photons with radius 6cm. A simulation follow the history of
photon by using Fortran Language and concerned on the effect of
Compton scattering angle on the count rate of scatter photons
and on the quality of the image. The Compton scattering angles
that study are in the range from (90°-100°) to (170°-180°) with
step 10°. The results show that the greater count rate of
scattered photons is improved in the angle range (90°-100°).
Therefore, the count rate decreases with increasing the angle
range especially within the range (170°-180°) which has a
minimum count rate and affect on the image resolution, then it
could not distinguish between the corrosion and non-corrosion
region. |
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