摘要
131I是核医学应用中较为重要的核素之一;133Ba是1种电子俘获核素,对HPGeγ谱仪能量刻度和效率校准具有重要意义。利用4πβ(PPC)-γ(HPGe)反符合测量装置对上述两种核素的活度进行了反符合测量方法研究,所得到的比活度测量结果分别为1794.8(1±0.6%)kBq.g-1(k=1)和502.8.(1±0.6%)kBq.g-1(k=1),与归一到相同参考时刻4πβ(PC)-γ(NaI(Tl))符合效率外推法的测量结果1 797.6(1±0.5%)kBq.g-1(k=1)和504.9(1±0.6%)kBq.g-1(k=1)均在不确定度范围内一致。
131^I is a very important nuclide applied in nuclear medicine. 133^Ba, an EC decay nuclide, plays a significant role in the efficiency calibration of HPGe detector. The activity measurement method for the above two kinds of nuclides was studied by the 4πβ（PPC）-γ（HPGe） anti-coincidence counting. The specific activity measurement result for 131^Isample is 1 794.8 （1 ± 0.6%） kBq · g^-1 （k = 1） and for 133^Ba is 502.8 （1 ± 0. 6？4）kBq · g^-1 （k=1）. Compared with the results measured by 4πβ（PC）-γ（NaI（Tl）） coincidence efficiency extrapolation methods at the same reference time, 1 797. 6（1 ± 0. 5%）kBq· g^-1（k=1）and 504. 9（1±0.6%）kBq· g^-1（k=1）, it is in good agreement within the uncertainties.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2008年第3期211-217,共7页
Atomic Energy Science and Technology
