Interaction of Negative Pions with Iodine

Abstract

The interaction of slow negative pions with iodine was studied radiochemically. From the yields of twenty-five radioactive nuclides, yield distribution curves were obtained for the isotopes of each of the seven elements preceding iodine in the periodic table. The total yields of each element and the displacement in mass units of the peak of each distribution from the line of maximum stability were found to be: Te 58 percent (-3), Sb 22 percent (-2), Sn 11 percent (0), In 3 percent (+1), Cd 0.7 percent (+1), Ag 0.12 percent (+2), and Pd 0.03 percent (+3 estimated). The sum of these yields accounts satisfactorily for essentially all the interactions of slow negative pions with iodine. The results reported here are compared with those of other investigations.