γ能谱中不同衬底材料的反散射峰研究

The Counter Scattering Peak of γ Energy Spectrum on Different Pad Materials

在利用不同材料作为１３７Ｃｓ放射源的衬底时，γ能谱中的反散射峰显著不同。反散射峰的大小在一定程度上可由金属的近电子理论予以定量解释，但Ａｌ的反散射峰却与其电子密度不相对应，有待于进一步研究。

The Counter scattering peaks of γ energy spectrum are obviously different when different materials are used as the pad of 137Cs radiative source.The size of the peaks can be quantitatively explained by the theory of near_free_electrons of metals.But the counter scattering peak of Al doesn't correspond to the density of its free electrons,and the further study will be needed.