Radioactive material detecting and identifying device and method

Abstract

Disclosed is an device for detecting and identifying a radioactive material, comprising: a first detector including a detection surface and generating first pulse signals when gamma rays are incident onto said detection surface; a second detector generating second pulse signals and provided in the front of the detection surface of the first detector, so that the gamma rays entering the second detector directly enter the first detector after passing through the second detector; and an identification unit. The identification unit comprises: a coincidence device configured to receive the first pulse signals and the second pulse signals from said first detector and said second detector; a multi-channel analyzer configured to receive the second pulse signals from the said second detector, the multi-channel analyzer counting said second pulses and generating the energy spectrum of the gamma rays according to the counted second pulses, when said first pulse signals and said second pulse signals are both valid; and a determination device configured to determine the type of the radioactive material emitting the gamma rays according to the generated energy spectrum and to determine whether a radiation exists or not according to said first pulse signals or said second pulse signals. The present invention also provides a method for detecting and identifying a radioactive material.

Dependencies are inferred from the claim text.