[IEEE 2009 1st International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA) - Marseille, France (2009.06.7-2009.06.10)] 2009 1st International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications - The use of fast and thermal neutron detectors based on oxide scintillators in inspection systems for prevention of illegal transportation of radioactive substances