Conceptual design of an orphan gamma source finder

A feasibility study of gamma ray source finder development for multiple sources scenario based on a Monte Carlo simulation

“…The procedure of identifying the type of gamma-ray source, finding the angular position, the spatial position, and the activity of orphan gamma-ray source is similar to the last published works 16,17 . A typically recorded gamma-ray spectrum of a single 95 Nb (isotropic in the distance of 0.01 m from the detector) using the MCNPXsimulated 20 Ø2″ × 2″ NaI(Tl) scintillation detector and its ROI is shown in Fig.…”

“…The proposed methods were based on photopeak net count of gamma-rays. In this research, extended new method based on the previously proposed method 16,17 is presented, which can be an OPEN Department of Physics, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran.…”

“…Then, the system moves horizontally by step d along the angular position, and the total count of the desired ROI will be recorded again (c 2 ). Thereupon, position of orphan gamma-ray source, will be calculated by (1) 10,17 .…”

“…The fourth and the last stage is the determination of the activity of orphan gamma-ray sources. Activity (in Bq) of each orphan gamma-ray source can be calculated using (2) 17 .…”

“…In our previous published works 16 , 17 , an instrument has been proposed with unique methods to find a single orphan gamma-ray source. The proposed methods were based on photopeak net count of gamma-rays.…”