Modeling of neutron source identifier using Fluka technique and its experimental verification

Fast and reliable identification of neutron sources is very important for the personal protection in nuclear industries and also in public domain. Most of the commonly used methods are very tedious, time consuming and is not always accessible to many laboratories and usually includes unfolding procedures for the identification of neutron source. This paper presents a new technique based on the ratio of the response of two thermal neutron detectors placed at different distances from the source, all placed inside the moderating assembly. Based upon the ratio of responses of neutron detectors, the unknown neutron source can be identified without employing energy-spectrum unfolding techniques. The measured data is compared with the values simulated with the FLUKA code. (author)