摘要
在用PMBP(1 苯基 3 甲基 4 苯甲酰基 5 吡唑啉酮 )从 14MeV中子照射过的天然U靶溶液中萃取Th流程的基础上 ,将萃取介质改为HNO3溶液 ,并将单次萃取 反萃改为两次萃取 反萃 ;在反萃溶液中加入I- 载体和NaNO2溶液 ,在Fe(OH) 3沉淀溶液中加入Br- 载体。用改进后的流程从 6 0MeV/u18O离子轰击天然U的HNO3溶液中分离Th ,从制得的Th样品的γ射线谱可以看出 ,该流程能去除绝大部分产物元素 。
The extraction medium was changed into HNO 3 solution based on the procedure of the extraction of thorium by PMBP from uranium irradiated with 14 MeV neutrons and thorium was extracted two times with PMBP. I - carrier and NaNO 2 solutions were added into back-extraction solution of 4 mol/L HNO 3 and Br - carrier was added into the solutions used for Fe(OH) 3 precipitation. Using the improved procedure thorium was separated from the nature uranium bombarded with 60 MeV/u 18O ions. It can be seen from the γ spectrum of the thorium fraction that the most of the production elements can be removed and especially bromine and iodine can be removed completely through the improved procedure.
出处
《科学技术与工程》
2004年第4期259-261,共3页
Science Technology and Engineering
基金
国家自然科学基金 ( 10 0 75 0 63
10 175 0 79)
国家重点基础研究发展规划 (G2 0 0 0 0 7740 0 )
中国科学院资助
