碳对α的非卢瑟福背散射截面研究

报道了散射角为１７０°±１．５°，α粒子能量在５－９．０ＭｅＶ之间，ｃ的背散射截面的实验测量值；用Ｒ矩阵理论，通过与实验数据拟合，分析、给出了一套能级参数，并计算了能量范围在２－９．０ＭｅＶ，ｃ的背散射截面；讨论了对背散射分析感兴趣的窄而孤立的强共振峰４２５０±１０ＫｅＶ随靶厚、角度的变化关系以及截面变化缓慢的平坦区３．６－４．２０ＭｅＶ，６．４２５－６．７００ＭｅＶ能区的截面值与背散射角度的关系。 关键词：

THE STUDY OF NON-RUTHERFORD BACKSCATTERING OF 4He FROM CARSON

The 170.0°±１．５° backscattering cross sections of ⁴He from C were measured in the energy range of 5.0-9.OMeV. The R-matrix was used to analyze the scattering cross sections, thus energy level parameters of the compound nucleus ¹⁶O, for alpha energies from 3.224MeV to 10.544MeV, were identified. These level parameters can be used to calculate the cross sections at certain angles according to the real experimental conditions The behaviour of a narrow strong resonance at 4.250MeV was inspected at different energy smear and scattering angles of 1650 and 1700. In the two energy regions: 3.600-4.200MeV and 6.425-6.700MeV, the cross sections exhi-bit a smoothly in creasing variation The messured and calculated cross sections show that in the energy range of 3.60-4.20MeV region, the cross sections are not significantly influenced by the scattering angle, but in the energy range of 6.425-6.700MeV region, the cross sections are strongly angle-dependent.