Experimental research of measurement method of ¹²⁹I transmutation ratio based on neutron activation analysis

Based on neutron activation analysis (NAA) technology, a reliable and convenient method was developed for ¹²⁹I transmutation ratio measurement. Simulative targets of natural ¹²⁷I were designed to examine the feasibility of the method. One reference target and two transmutation targets of ¹²⁷I (simulating targets before and after transmutation, respectively) were irradiated together on a NAA device. According to the intensity ratio of gamma ray emitted by ¹²⁸I in the transmutation targets and the reference, transmutation ratio was measured correctly. The results show that the NAA method developed in this work is feasible and convenient, and could be used for determining the transmutation ratio of ¹²⁹I.