Springer Iranian Journal of Science and Technology (Sciences) 1028-6276 32 3 2008 09 06 DETERMINATION OF NEUTRON DETECTORS SHIELD USED FOR THE DETECTION OF LANDMINES 227 233 2292 10.22099/ijsts.2008.2292 EN D. REZAEI OCHBELAGH Department of Physics, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, I. R. of Iran H. MIRI HAKIMABAD Physics Department, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I. R. of Iran R. IZADI NAJAFABADI Physics Department, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I. R. of Iran Journal Article 2006 09 16 As a result of being hydrogenous moderators, several landmine detection methods based on<br />nuclear techniques have been suggested in recent years. Because of elastic scattering and moderating neutrons from hydrogen atoms in landmines, detection of backscattered neutron shows an anomaly in the reflected thermal neutrons count when a detector scans over a mine. On landmine detection using neutron sources, a detector and its shielding play an important role. In this paper, based on the investigations and calculations performed by MCNP code (Monte Carlo N-Particle transport code), detector shielding materials and their thicknesses have been determined. Therefore, the effects of moderators such as graphite, heavy water, beryllium, polyethylene and boric acid on backscattered neutron flux have been investigated. https://ijsts.shirazu.ac.ir/article_2292_b7436b2627122e4793c96a58afe9111d.pdf