Independent yields of 82Br, 86Rb, 136Cs and 150Pm in spontaneous fission of 252Cf

Abstract

Independent fission yields in the spontaneous fission of 252Cf were determined by radiochemical techniques for the shielded nuclides 82Br, 86Rb, 136Cs and 150Pm. They were found to be < 3·7 × 10 −6 per cent, 5·4 × 10 −6 per cent, 2·2 × 10 −2 per cent and 2·0 × 10 −2 per cent, respectively. The corresponding fractional chain yields lead to empirical Zp (most probable charge) values which are in good agreement with Zp values determined by physical methods (K X-rays).