Document Type : Scientific Note

Author

• Mohammad Arkani

Assistant Professor Nuclear Science and Technology Research Institute (NSTRI) Reactor and Nuclear Safety Research School

Abstract

One of the frequently observed random processes in nuclear experiments, is the Poisson process. Due to the dead time effect of the detection systems, the experimental process is different from the Poisson process. In this work, based on stochastic methods, a nuclear detection system is identified. One of typical pulse mode detectors is BF3 detector. In this research, a typical BF3 detector is selected to implement the above method, and then observed pulses at the output of the detector in the time domain were measured and analyzed using the stochastic analysis of fluctuations. In experiments such as measurements related to the zero-power reactor noise theory, the transfer function of the detection system itself also has an effect on the obtained results. Therefore, knowledge of the transfer function of the detection system used in these experiments is of particular importance. Also, in the measurements where it is necessary to correct the dead time of the detection system, the specificity of the transfer function can provide useful information about the effects of the dead time. In this research, the transfer function of a typical neutron detection system based on BF3 detector has been investigated.

Keywords

• uncorrelated random pulses
• Poisson probability distribution function
• nuclear detector

Main Subjects

• NUCLEAR PHYSICS AND RADIATION PHYSICS