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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-)18Neg.s. in a recent experiment,exhibits an evident dip around 23°.
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