Electric and Magnetic Polarizabilities of the Nucleons and Pions

Small-Angle Elastic Scattering of Neutrons and the Electric Polarizability of the Neutron

“…1 Aleksandrov 2 and Aleksandrov, Anikin, and Soldatov 3 observed this effect for uranium and Plutonium with neutrons of a broad energy spread that averaged about 2. 8 MeV.…”

“…Protons emitted at 35±3° in the momentum interval from 346 to 455 MeV/c are detected by a thin-plate spark chamber followed by a "range" spark chamber made up of 25 aluminum plates 1 mm in thickness. 1 In addition to this we determine the direction of the two pions by letting each traverse a sys-tem of two spark chambers. The positions of these were chosen so as to select, with reasonably flat geometrical efficiency, total centerof-mass energies of the ir-ir system within the interval from roughly 280 to 600 MeV.…”