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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￣（１８１）Ｈｆ，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射线发射串测定为０．８０５５±０．００４８。仔细讨论了测量结果的误差，并同文献给出的数据作了比较。
Described herein is the use of the intensity balance method to determine ¯ (181) Hf activity and γ-ray emission probability. The rationale for the method is that the activity of the mother nucleus equals the sum of the intensities of all the rays that reach the ground state of the nucleus, and for ~ (181) Hf these rays consist of about 97% gamma rays and about 3% of the converted electrons. The probability of γ-ray emission was measured with a HPGe detector and the conversion electron emissivity was calculated using the literature conversion coefficient. The total uncertainty of measurement activity was ± 0.8%, and the 482.0 keV gamma ray emission was measured as 0.8055 ± 0.0048. The errors of the measurement results are carefully discussed and compared with the data given in the literature.