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较小动量转移下γ射线的相干散射
PHOTON COHERENT SCATTERING AT THE RELATIVELY SMALL MOMENTUM TRANSFER
【摘要】 用141Ce源的145keVγ射线和Ge(Li)谱仪,对Al,Fe,Cu,Pb样品,在动量转移x=1.2—5A-1的范围内的相干散射进行了测量,实验结果在误差范围内与基于相对论的Hartree-Fock方法的形状因子近似理论计算值相吻合。
【Abstract】 Using the radioactive gamma ray source 141Ce (Er = 145 keV) and Ge(Li) detector (FWHM = 2.21keV at 1.33 MeV), we have measured the cross sectipn of photon coherent scattering from Al, Fe, Cu and Pb over the range of momentum transfer x=1.2-5.0 A-1. The theory of form-factor approximation resulting from relativistic Hartree-Fock (RHF) atomic model is found to be adequate in explaining the experimental results.
- 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,1987年05期
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