63^rd ANNUAL CONFERENCE OF THE SA INSTITUTE OF PHYSICS

Data Processing Procedure for the Time-of-Flight Spectrometer of Heavy Ions in the wide range of Energies.

26 Jun 2018, 15:00

2h

Poster Presentation Track B - Nuclear, Particle and Radiation Physics Poster Session 1

Speaker

Mr Vusi Malaza (Stellenbosch University, Faculty of Military Science)

Description

At the present moment it is well known that detecting fission fragments from a decay of heavy nuclei using silicon detectors comes with two experimental challenges, namely Pulse Height Defect and Plasma delay. The negative effect of the Pulse Height Defect (PHD) is observed when registering the energy of the fission fragment and the one of Plasma Delay (PD) is observed when registering time of the fission fragments using the silicon detectors. Finding a solution to these experimental challenges is critical to the investigation of the decay of low excited heavy nuclei called “Collinear Cluster Tri-partition” (CCT)[1]. A precise but rather complicated procedure that takes into account the above mentioned experimental challenges (PHD and PD) has been successfully developed. This procedure involves an iterative process where the correct masses of fission fragment are calculated taking into account both PHD and PD in the measurement of energy and Time-Of-Flight (TOF) respectively. This procedure is divided into 3 stages. The first stage is the first approximation where the energies of the fission fragment is calculated without taking into account the PHD and the PD. The second stage is the calculation of the PHD value using an empirical formula derived by Mulgin et al [2]. The last stage involves using a special equation suggested by Neidel and Henschel [3] to calculate the PD. In this way, the correct PD values are obtained and are then used to calculate the correct TOF for fission fragments. A special code to perform the abovementioned procedures was first designed in Fotran 95 programming language. At the moment a newly improved and modern code is currently being developed in C++ programming language. This modern code also includes a design of an easy to use graphical interface that runs the iteration used to find the parameters without compiling. In this paper we present both the description of this analysis procedure and a detailed explanation of this modern code. References: 1. Pyatkov Yu.V. et al.,Eur. Phys. J. A 48 (2010) p 94 2. Mulgin S. et al., NIM A 388 (1997) p 254-259. 3. Neidel H, Henschel H., Nucl. Instr. Meth. 178 (1980) p137 - 148

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