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List of Figures

1.1 Atom based on Rutherford theory . . . .          2
                                                     2
1.2 Atom based on Rutherford theory . . . .          7

1.3 Example of Non-shielded sealed source            8
      design of Cf-252 neutron source. . . . .       9
                                                    10
1.4 Vertical cross section gives a side view        13
      of typical TRIGA type research nuclear        17
      reactor. . . . . . . . . . . . . . . . . . .

1.5 Components of target in a spallation neu-
      tron source. . . . . . . . . . . . . . . . .

1.6 Layout of spallation neutron source con-
      sist of accelerator with a target. . . . . .

1.7 Illustration of neutron elastic scattering
      when neutron intract with the target. . .

1.8 Neutron shielding. . . . . . . . . . . . .

2.1 Principle of neutron backscatterred tech-
      nique. . . . . . . . . . . . . . . . . . . . 25

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