【摘要】 用Glauber多次散射理论和相干涨落核模型,计算了能量在（3,3）共振区的π⁺介子在¹⁶O和¹⁸O靶核上引起的双电荷交换反应截面。理论计算的¹⁸O（π⁺,π^-）¹⁸Ne_g.s.和¹⁶O（π⁺,π^-）¹⁶Ne_g.s.反应截面的比值,很好的符合实验值。理论预言了¹⁸O（π⁺,π^-）¹⁸Ne_g.s.微分截面角分布在角度为23°附近有极小值,实验表明了这个极小的存在。更多还原

【Abstract】 Using Glauber’s multiple scattering theory, and using coherent fluctuation nuclearmodel, the double charge exchange （DEC） reaction cross sections for πon ¹⁶O and ¹⁸Ohave been calculated. The calculated values of the ratio of σ(¹⁸O（π⁺,π^-）¹⁸Ne)_g.s. toσ(¹⁶O（π⁺,π^-）¹⁶Ne)_g.s. fit the experimental data quite well. Just as predicted by ourcalculation, the angular distribution of ¹⁸O（π⁺,π^-）¹⁸Ne_g.s. in a recent experiment,exhibits an evident dip around 23°.更多还原