Neutron activation is one of the used methods in treatment and distinguish of diseases in which considering energy and number of emitted gamma, type and amount of trace elements of body are determined. Precision of ...

case includes two pairs of 241Am-Be neutron sources. Each pair (with 70 cm distance between two sources) is positioned within up and down 40 × 110 cm2 area graphite collimators. Also, four moderator/reflector objects are added to transversal body...

of activation. The aim of this study was to determine the optimum pre-moderator, in terms of material for attaining uniform activation probability with a CV value of about 10% and changing the collimator role to increase activation rate within the body...

In the present study, a new detector collimator has been designed to detect the buried anti-personal (AP) landmines for use in gamma-ray backscattering device, with Monte Carlo method. The new detector collimator is made by lead and it has...