摘要
采用^(152)Eu点源作为干扰核素,模拟高本底复杂环境对^(57)Co、^(133)Ba低能核素全能峰效率的影响。用高、中、低能三种点源在距离便携式HPGeγ谱仪探头25 cm处,以不同次序叠加测量,分析所得全能峰效率与其单独放置时测量结果的相对偏差,并与固定式HPGeγ谱仪测量结果进行比较。结果显示:^(152)Eu点源对^(57)Co和^(133)Ba主要能量峰效率的影响量最大为7.1%,最小为1.3%;在三种特定叠加次序下,各能量峰效率的平均相对偏差均在4%以内。且与固定式HPGeγ谱仪测量结果一致。
152Eu point source was used as interference nuclide to simulate the influence of high background complex environment on the efficiency of 57Co and 133Ba low energy nuclides.Three point sources of high,medium and low energy are overlaid in different order and measured at the distance of 25 cm from the portable HPGe γ spectrometer probe.The relative deviation between the total peak efficiency and the measured results is analyzed,and the results are compared with the measured results of the fixed HPGe γ spectrometer.The results show that the maximum effect of 152Eu point source on the main energy peak efficiency of 57Co and 133Ba is 7.1%,the minimum is 1.3%,and the average relative deviation of the efficiency of each energy peak is less than 4% under the three particular superposition order.The results are in agreement with the measured results of the fixed HPGe γ spectrometer.
作者
陆小军
何林峰
徐一鹤
赵超
宋家斑
韩刚
唐方东
LU Xiao-jun;HE Lin-feng;XU Yi-he;ZHAO Chao;SONG Jia-ban;HAN Gang;TANG Fang-dong(Shanghai Institute of measurement and Testing Technology,Shanghai 201203,China)
出处
《核电子学与探测技术》
CAS
北大核心
2018年第5期608-612,共5页
Nuclear Electronics & Detection Technology
基金
上海市科委科研计划项目(16DZ2292300)
上海市计量测试技术研究院科研项目(H00RY1709)资助
关键词
干扰核素
便携式HPGeγ谱仪
全能峰效率
影响
interfering nuclide
portable HPGe γ spectrometer
full energy peak efficiency
influence
