【摘要】 应用费米理论计算了７０余种核素的β谱形、效率关系，研究了某些核素在低能区的归—化效率函数。通过估算归一化效率函数，指导实验测定最佳多项式拟合方幂和γ窗位置、确定最可几活度，并用于效率示踪技术。给出了１３４Ｃｓ、１７７Ｌｕ、１４７Ｎｄ、１２４Ｓｂ和６３Ｎｉ的计算和测定结果。更多还原

【Abstract】 The shapes of beta spectra and efficiency relation of the different beta branches are calculatedby applying Fermi theory for more than seventy nuclides. The normalization efficiency function inlow energy region are calculated for nuclides more than thirty. The estimated normalization efficiency functions can be used to guide experiments. When the fitting order and the gate setting areoptimum experimentslly, the most probable activity are determinated. This method were appliedin the efficiency tracer technique. The results of the calculations and the measurements are presented for nuclides 134Cs, 177Lu, 124Sb and 63Ni.更多还原