Cs-137 activity of the composite profile HZM19

47 samples were sampled with a thickness of 2 cm. The activity of Cs-137 was determined directly by gamma-ray spectrometry from freeze-dried and homogenized samples. Gamma...共选取47份厚度为2厘米的样品。采用γ射线能谱法（gamma-ray spectrometry）直接对经冷冻干燥且均质化处理的样品，测定其中铯-137（Cs-137）的活度。γ...