Page 6 - bukuneutron

2.2 Spectrum of spontaneous fission-neutron
from and Cf-252 sealed source before
and after thermalization using 150 cm
of water.[?] . . . . . . . . . . . . . . . . 26

2.3 Illustration showing the neutron gauge
applemented in neutron back-scattered
technique during inspection of the hy-
drocarbon layers in the storage tank . . 29

2.4 The formation of various layers of differ-
ent materials in oil storage tank. . . . . . 30

2.5 Illustraion of the gap between founda-
tion and floor of storage tank. . . . . . . 33

2.6 Principle of neutron gauge for tank floor
scanning technique. . . . . . . . . . . . 34

2.7 Illustraion of Moisture meter containing
neutron radioactive sources inserted into
the tube at a desired depth. Adotpted
from [?] . . . . . . . . . . . . . . . . . . 36

2.8 Principle of neutron moisture gauge. . . 38

2.9 Typical layout of neutron moisture gauge
and the principle of neutron back scat-
tered technique. . . . . . . . . . . . . . 42

3.1 NAA [?] . . . . . . . . . . . . . . . . . . 52

3.2 Decay scheme of gold-198 after gone
through neutron-captured nuclear reac-
tion of gold-197 with thermal neutron . . 56

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