Experimental calibration of the detector die away time in the different rigns of the PSMC

Most current Neutron Multiplicity Counting (NMC) models are constructed under a single energy point model. In other words, the models assume the both the reaction rates an the die away time can be averaged in a reasonable manner over both the energy and the spatial location. In recent years, as the use of NMC method is growing, more elaborated techniques are developed, and understanding the systematic uncertainty due to the single energy point model becomes more and more important. In the present short study, the detector die away time of each of the 4 detection rings of the PSMC is experimentally measured, and the impact of the results on the single energy point model are discussed.