Spatial- and Time-Correlated Detection of Fission Fragments

¹ Institute of Experimental and Applied Physics, Czech Technical University in Prague, Czech Republic
² Joint Institute for Nuclear Research (JINR), Dubna, Russia
³ Nuclear Physics Institute, Ac. of Sciences of the Czech Republic, Rez near Prague, Czech Republic

^a e-mail: carlos.granja@utef.cvut.cz

Abstract

With the goal to measure angular correlations of fission fragments in rare fission decay (e.g. ternary and quaternary fission), a multi-detector coincidence system based on two and up to four position sensitive pixel detectors Timepix has been built. In addition to the high granularity, wide dynamic range and per pixel signal threshold, these devices are equipped with per pixel energy and time sensitivity providing more information (position, energy, time), enhances particle-type identification and selectivity of event-by-event detection. Operation of the device with the integrated USB 2.0 based readout interface FITPix and the control and data acquisition software tool Pixelman enables online visualization and flexible/adjustable operation for a different type of experiments. Spatially correlated fission fragments can be thus registered in coincidence. Similarly triggered measurements are performed using an integrated spectrometric module with analogue signal chain electronics. The current status of development together with demonstration of the technique with a ²⁵²Cf source is presented.