METHOD FOR RADIATION MONITORING MOVING OBJECTS AND PORTAL RADIATION MONITOR FOR REALISING SAID METHOD Russian patent published in 2010 - IPC G01T1/16 

FIELD: physics, navigation.

SUBSTANCE: invention relates to radiation monitoring and can be used primarily for detecting radioactive materials based on detection of gamma-ray emissions during unauthorised movement of the materials through checkpoints of enterprises, organisations and services. The method involves detection of background gamma-ray quanta using at least two gamma-ray detectors, counting background gamma-ray quanta detected in the given period of time, detection of the monitored object in a control zone, detection of the moment in time at which the monitored object approaches gamma-ray detectors by a given distance R_p, determination of the moment in time when the monitored object moves away from the gamma-ray detectors by a given distance R_u, detection of gamma-ray quanta using at least two gamma-ray detectors when the monitored object is in the control zone from the moment the monitored object approaches the gamma-ray detectors by a given distance R_p until the moment the monitored object moves away from the gamma-ray detectors by a given distance R_u. Distances R_p and R_u are determined by expressions R_p=(0.8-1.2)(H+D) and R_u=(0.8-1.2)(H+D), where H is altitude of the horizontal plane, which is the plane of symmetry of the gamma-ray detectors; D is half the distance between two gamma-ray detectors placed at the same height.

EFFECT: reduced minimum detected mass of radioactive material, as well as reduced probability of passing radioactive material, including in case of counteraction of the monitored object.

11 cl, 6 dwg