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area of TRIGA type nuclear research reactor is shown
in Figure 1.4 Thermal neutron is widely used for vari-
ous irradiation applications. Thermal neutron is a re-
sultant of moderation process where many neutron in-
volved in slow down by a collision with hydrogen atom.
Therefore, hydrogenous material such water, polymer
and etc are a good moderator materials. Therefore,
research reactor is considered a static and large neu-
tron source. Neutron from reactor core is conditioned
into an appropriate form before being utilized for sev-
eral applications such as imaging of internal structure,
diffraction from a lattice of atoms and etc.
Figure 1.4: Vertical cross section gives a side view of
typical TRIGA type research nuclear reactor.
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