Evaluation of column separation methods for simplification of the wet chemistry approach to isolation of At

Atの分離に対する湿式分離法の簡素化のためのカラム分離法の評価

渡辺 茂樹; Gagnon, K.*; Hamlin, D. K.*; Chyan, M.-K.*; Balkin, E. R.*; Wilbur, D. S.*

Watanabe, Shigeki; Gagnon, K.*; Hamlin, D. K.*; Chyan, M.-K.*; Balkin, E. R.*; Wilbur, D. S.*

Difficulties with reproducibility of isolation yield when distilling At from irradiated bismuth targets led us to use a "wet chemistry" approach for that process. The wet chemistry approach has provided At isolation yields of 78% after decay and Bi attenuation corrections. However, the use of diisopropyl ether (DIPE) in the separation process has made it difficult to reach our goal of automating the At reaction. Therefore, we have investigated the use of column materials to simplify the isolation of At and remove DIPE from the process. In this investigation, we evaluated the use of a strong anion exchange resin (AG1x8), a strong cation exchange resin (AG MP-50) and a polypropylene glycol (PEG)-coated resin for separation of At from the bismuth target material.