Iodine-125 radioactivity during production test using enriched Xenon-124 target

Production tests of Iodine-125 have been carried out using enriched xenon target with 82,4% of ¹²⁴Xe enrichment. The target was irradiated at irradiation chamber in S1 position of G.A. Siwabessy reactor. After irradiation for 24 hours, the irradiated xenon gas was decayed at decay pot for 7 days. The produced iodine-125 was dissolved 3 times using NaOH 0.005N. From 1^st to 8^th tests, the total radioactivities were 9541, 9801, 11239, 9458, 3293. 3735, 4693 and 2744 mCi. The decrease of the total radioactivity was caused by the decrease of the gas target. Radioactivity of the 1^st solution depended on the volume of NaOH solution. The average percentages of the 1^st solution were 65.1, 71.5 and 82.6% of the total radioactivity for 3, 4 and 5 mL of NaOH. The maximum radioactivity concentration was 3410 mCi/mL from 1^st solution of the 1^st production test. (author)