P－D背散射截面及质子在固体中的多次散射

报道了由质子束轰击Ｍｏ厚衬底上的氯化钛薄膜的背散射谱得出的Ｐ－Ｄ背散射的截面数据．由于Ｐ－Ｄ散射谱是叠加在Ｐ－Ｍｏ背散射谱上的，所以通过对服从卢瑟福截面公式的Ｐ－Ｍｏ背散射谱进行理论拟合而间接得出Ｐ－Ｄ背散射产额．讨论了质子在固体中的多次散射对Ｐ－Ｍｏ散射谱高度的影响，这种影响是不能忽视的，它使实验谱和不考虑多次散射效应而得出的理论谱有很大差异．并根据实验数据总结出了多次散射造成谱的升高对散射能量、散射深度、及散射角度的依赖关系．

P-D back-scattering cross sections and the multi-scattering of protons in solid

fter analysing the spectra of protons back-scattering from the titanium deutride thin film deposited on Molybdenum, the cross section of P-D back scattering was deduced in this paper. Because the P-D back-scattering spectra are superposed on the PMo scattering spectra, the counts of P-D back-scattering were gotten indirectly by theoretically analysing the spectra of P-Mo scattering which obeys the Rutherford formula.The multi-scattering of protons in solid,which causes a large discrepancy between the PMo experimental spectra and the P-Mo theoretical one,had been also discussed. Based on the experimental data,the dependence of the variation of P-Mo scattering counts on the scattering energy, scattering degree and scattering depth, which is caused by the multi-scattering of protons,was deduced.