Energy distributions and absolute yields of the charged light particles emitted during the thermal neutron induced ternary fission of 235U

Abstract

The energy distributions and the yields of the main charged light particles emitted during the thermal neutron induced ternary fission of 235U were studied using a very pure neutron beam of the Grenoble high-flux reactor. All the measured energy distributions except that of the α-particles are compatible with a gaussian shape. Explanations for this phenomenon are presented. For the main ternary particles following absolute yields were determined: protons 0.016 × 10 −3, tritons 0.106 × 10 −3, alphas 1.696 × 10 −3 and 6He 0.029 × 10 −3 particles per fission reaction. These results are discussed and compared with other data.