
Applications of Tagged Neutron Beams
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uranium can be detected even behind 10cm of lead shield as soon as the distance
between the depleted uranium and one-side shielded 4″ × 4″ NaI (Tl) is no more
than ~30cm. At the same time, 10cm of lead shield is sucient to prevent the
detection with handheld unshielded detector at the distance of ~30cm.
Figure 7.28 shows the experimental setup inside and outside the container
together with the position of the tagged neutron cone and neutron source dur-
ing the active measurements. Diameter of the tagged neutron cone 104cm from
the tritium target was 16cm. Axis of the tagged neutron cone was under 39 ...