摘要
一、序言^(147)Pm是一种具有2.62 a半衰期,发射粒子最大能量为224.5 keV的软β幅射源(γ发射很弱),有广泛的用途。^(147)Pm虽有^(146)Nd(n,γ)^(147)Nd→Pm的生产方法,但其产量有限,成本高。而核裂变产物^(147)Pm——核动力堆的副产物,来源是非常丰富的。但是,在裂变产物^(147)Pm中除存在^(148)Pm(T_(1/2)=5.4 d)和^(148)Pm之外。
The ratios of ^(146)Pm to ^(147)Pm were determined. When the burnups were 1.5×10~4 and 1.7×10~4 MWd/tU, the ratios were 2.6×10^(-6) and 3.0×10^(-6) respectively.The activity of ^(146)Pm was measured with the γ-ray spectra by a Ge (Li) detectorand that of ^(147)Pm with determination of beta particles by a terphenyl scintillationdetector. The samples of Pm in the spent fuel for a power reactor before measu-rement were separated from Sr, Cs, Ce, U, transuranium elements and others withlevextrel chromatography and then from the other rare earth elements etc. withthe HPLC using α-HIBA.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1990年第5期86-90,共5页
Atomic Energy Science and Technology
