【摘要】 <正> 纯β发射体衰变率绝对测量的效率示踪法是利用一种衰变率精确已知的适当的β（或β-γ）核素作为示踪剂,并与待测核素在同样的条件下计数,然后把待测样品的计数率N_β当作示踪剂计数效率ε_β的函数,外推到ε_βT为1处。这样得到的外推值就被认为是待测样品的衰变率。用一个式子来表示,就是:更多还原

【Abstract】 The correspondance of the channel ratios was checked to evaluate the correspondence of the experimental spectra of two nuclides in a simplified efficiency tracing measurement of disinteg rating rate of tritium using 14C as a tracer. A linear efficiency tracing curve was successfully obtained with an interpolation method of the channel ratio, in which the efficiency loss ratio is about 1.000 ±0.001.更多还原