Range measurements of fission products. I. Comparison with stopping theory

Range distributions in H₂, He, Ne, and Ar, are reported for seven fission products (Zr⁹⁷, Mo⁹⁹, Rh¹⁰⁵, Pd¹¹², In¹¹⁵, Te¹³², Ce¹⁴³). The method of electrostatic collection of these products has been explored, and high collection efficiencies are observed for most products. The width of the observed distributions is resolved into a contribution from the stopping effects and a contribution from the fission process. The average range values and the stopping straggling are compared with the theory of Lindhard, Scharff, and Schi\o{}tt. The differences between theory and experiment are ≈ 5 to 50%.