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Consider the equipment pulsed neutron logging (INC). It comprises a source of fast neutrons (so-called "neutron generator") [4] and a set of detectors, thermal (or epithermal) neutrons, forming a so-called short-range (BR) and a distal (DMZ) probes [5]. Measuring cycle INC device on each slice depth process includes exposure breed fast neutron flux generated by the generator, and the registration number of the recession heat (epithermal) neutrons in time, reaching near and far detector probes. In order to exclude the neutron detectors directly to the source, is placed between the two special filters, slowing and absorbing neutrons. As a material which retards the filter is often used nylon, which has a high hydrogen content [6].
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