Experimental setup of the ²³⁹Pu neutron capture and fission cross-section measurements at n_TOF, CERN

Abstract

The experimental setup of the new measurement of ²³⁹Pu fission and capture cross-section in the n_TOF time-of-flight facility at CERN is presented. The measurement aims to address the needs and demands of nuclear data users. The experiment incorporates an innovative fast Fission Fragment Detector and the n_TOF Total Absorption Calorimeter, enabling the implementation of the fission tagging technique. Preliminary results exhibit the robust performance of the detector systems, along with the high quality of the new ²³⁹Pu samples. These samples were exclusively produced for this measurement by the European Commission’s Joint Research Centre in Geel.