Die Änderung der Ionenladung von Spaltprodukten bei der Abbremsung in metallischen Absorbern

Abstract

An experimental set-up is described, which was used to measure the energy and mass as well as the ionic charge of fission products emitted by a Cf²⁵²-spontaneous fission source. The fragments were deflected in a magnetic field of 9700 Oe (Gauss) and were detected by means of two position-sensitive semiconductor detectors.

Thin foils of Al, Ni, Ag, and Au were used to investigate the influence of metallic absorber materials on the ionic chargeQ. Within the limits of experimental error it was found thatQ only depends on the velocityv and the atomic numberZ _I of the ions. The relative ionic charge γ=Q/Z _I was found to vary solely withv. The results were compared with those of Moaket al., Almquistet al., Leischner, Opoweret al., and with the theoretical predictions of Bohr. An empirical formula proposed by Leischner was used to fit the experimental data.