Measurement of photoneutron spectrum at Pohang Neutron Facility

The Pohang Neutron Facility, an electron linear accelerator (linac) based pulsed neutron facility. was constructed for nuclear data production in Korea. It consists of an electron linac, a water-cooled Ta target with a water moderator, and a time-of-flight path with an I I m length. The neutron energy spectra are measured for different water levels inside the moderator and compared with calculations by the Monte Carlo N-Particle transport code. The optimum size of the water moderator is determined based on these results. (C) 2002 Elsevier Science B.V. All rights reserved.X13