Neutron activation analysis for ultra low contents of uranium and thorium in aluminium and silica |
| |
| Authors: | T Mitsugashira Y Koma S Hirai I Okada N Kurashima H Sakurai |
| |
| Institution: | (1) Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, 980 Sendai, (Japan);(2) Atomic Energy Research Laboratory, Musashi Institute of Technology, Ozenji, Asou-ku, 215 Kawasaki, (Japan) |
| |
| Abstract: | Highly sensitive neutron activation analysis of uranium and thorium in high quality silica and aluminium has been investigated using the Japan Materials Testing Reactor (JMTR), having a thermal neutron flux higher than 1014 n/cm2/s. In order to determine ultra-low contents of uranium and thorium,239Np and233Pa as activation products were separated by using anion exchange and LaF3 coprecipitation methods. As a result, a number of interfering radioactive isotopes containing double neutron capture product such as183Ta were removed completely from the isolated239Np and233Pa fraction and the detection limits for uranium and thorium were found to be 2·10–12 g and 4·10–13 g, respectively. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
