摘要
本文描述强度平衡法用于测定^(181)Hf活度和γ射线发射几率。方法的原理是母核活度等于到达子核基态上所有射线的强度之和。对于^181Hf,这些射线由约97%的γ射线和约3%的转换电子组成。用HPGe探测器测量γ射线发射几率,用文献转换系数计算转换电子发射率。测量活度的总不确定度为±0.8%。482.0keVγ射线发射率测定为0.8055±0.0048。仔细讨论了测量结果的误差。
This paper describes that intensity balance method has been applied to the determination of activity and gamma-ray emission probabilities in the decay of"Hf.the principle of this method is that parent activity is equal to the sum of the intensities of all rays arrived at daugh-ter grand state.These rays are composed of~97%gamma-rays and~3%conversion elec-trons.The gamma-ray emission rates are measured by HPGe detector.The conversion elec-tron emission rates are caiculated using conversion coefficlents offered by the literatures.The total uncertainty of the measured activity is±0.8%.The 482.0 keV gamma-ray emission probability is determined as 0.8055+0.0048.The errors of the measured results are carefully discussed and compared with the data offered by the literatures.
作者
常永福
黎荫铭
史桂兰
张合军
Chang Yongfu;LI Yinming;Shi Guilan;Zhang Hejun(Northwest Tnstitute of Nuclear Technology,Xi'an.710024)
出处
《核电子学与探测技术》
CSCD
北大核心
1994年第1期8-15,共8页
Nuclear Electronics & Detection Technology
