A DOUBLE DELTA-E-E DETECTION SET-UP FOR TERNARY FISSION

A double Delta E-E detection set-up was constructed to measure the yie ld and energy characteristics of a-particles and tritons emitted in te rnary fission processes. The binary fission fragments can also be meas ured in the same geometrical conditions. A methane filled, back-to-bac k ionization chamber with common cathode is used for the Delta E-secti ons. The ternary particles are stopped in two surface barrier detector s situated inside the gas chamber. The detection set-up has been teste d with the spontaneous ternary fission of Cf-252 and the neutron induc ed ternary fission of U-235 at the GELINA facility of the IRMM at Geel . The results have been compared with a computer simulation of the exp ected energy signals for the applied configurations.