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Experimental study of cross-section ratios in the collisions of Cq+ and oq+(q= 1-4) on atomic helium in strong-interaction region 下载免费PDF全文
We have measured the cross-section ratios of helium induced by Cq+ and Oq+ (q=1-4) in an energy range from 20 keV/amu to 500 keV/amu, and obtained the two-dimensional spectra by employing the coincidence method combined with the MPA-3 data acquisition system. Hence, we obtain the ratios of total single-ionization cross-sections (SI, SC, SLSI, and DLSI), total double-ionization cross-sections (DI, DC, TI, SLDI, and DLDI) and cross-sections of every process (SI, SC, SLSI, DLSI, DI, DC, TI, SLDI, and DLDI), which induce the single-ionization and double-ionization, to the total cross sections respectively. The competitive relations between the reaction-channels and the experimental data law of each reaction-channel are revealed explicitly, and the qualitative explanations involved in those results are also presented accordingly. 相似文献
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The crystal structure of the title complex was measured, in which the two zinc atoms with coordination polyhedron of distorted tetragonal pyramid (TP) are bridged by an imidazolate in the apical position of the TP forming a dimer. The isomorphous [(trien)Cu(im)Zn(trien)](ClO4)3·H2O complex was doped in the title complex and the recorded single-crystal ESR spectra by fitting gave two sets of the principal values of g and A tensors, which were assigned to the physically distinct sites of the two magnetically equivalent molecules in the unit cell. Lattice distortion at the Cu(II) ion sites and the bonding parameters of Cu(II) ions are further calculated, and the bonding nature of Cu(II) ions is discussed. 相似文献
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测定了四氯二氨合铂(Ⅳ)(cis-Pt(NH_3)_2Cl_4)的晶体结构.晶体属单斜晶系,空间群为C2/c,晶胞参数:a=6.097(3),b=10.188(7),c=11.264(7)(?);β=95.97(4)°;Z=4.利用Patterson法得到Pt原子位置,经差值Fourier合成找到其余非氢原子的位置,用全矩阵最小二乘法修正,最后R因子为0.0676.采用修正的Urey-Bradley力场(以下简称U-B力场)对cis-Pt(NH_3)_2Cl_4的振动光谱进行了简正坐标分析,振动基频的计算值与观测值相符合,两者平均误差为3.61cm_(-1),平均百分误差为0.759%,最大误差为11.9cm~(-1).根据位能分布进行了各振动光谱的归属,并讨论了简正坐标分析中内坐标与力场的关系. 相似文献
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