Mastren Tara, Radchenko Valery, Owens Allison, Copping Roy, Boll Rose, Griswold Justin R, Mirzadeh Saed, Wyant Lance E, Brugh Mark, Engle Jonathan W, Nortier Francois M, Birnbaum Eva R, John Kevin D, Fassbender Michael E
Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87545, USA.
TRIUMF, Vancouver, BC V6T 2A3, Canada.
Sci Rep. 2017 Aug 15;7(1):8216. doi: 10.1038/s41598-017-08506-9.
A new method has been developed for the isolation of Ra, in high yield and purity, from a proton irradiated Th matrix. Herein we report an all-aqueous process using multiple solid-supported adsorption steps including a citrate chelation method developed to remove >99.9% of the barium contaminants by activity from the final radium product. A procedure involving the use of three columns in succession was developed, and the separation of Ra from the thorium matrix was obtained with an overall recovery yield of 91 ± 3%, average radiochemical purity of 99.9%, and production yields that correspond to physical yields based on previously measured excitation functions.
已开发出一种从质子辐照钍基质中高产率、高纯度分离镭的新方法。在此，我们报告一种全水相工艺，该工艺采用多个固相支持吸附步骤，包括一种柠檬酸盐螯合方法，该方法能从最终镭产物中通过活性去除>99.9%的钡污染物。开发了一个连续使用三根柱的程序，从钍基质中分离镭，总回收率为91±3%，平均放射化学纯度为99.9%，生产产率与基于先前测量的激发函数的物理产率相对应。
