Kernphotoeffekt an Aluminium und Fluor mit der Lithium-Resonanz-Strahlung

Fragments from thermal fission of U²³⁵ have been slowed down in purified Ar and N₂. Ionization by reactor radiation produced sufficient free electrons in the gas to permit formation of negative fission product ions by electron attachment. These negative ions were collected in an ionization chamber. Theγ-radiation of the activated electrode showed that mainly J and Te had been collected. By analysis of theγ-spectra the independent fission yieldsη(J¹³⁵)=(4,6±1,1)% andη(Te¹³⁵)=(1,5±1,1)% were found. In the derivation of this result an estimated valueη(Te¹³⁴)=(6±0,7)% was used.