학술논문
A neutron source for IGISOL-JYFLTRAP: Design and characterisation
Document Type
Author
Mattera, Andrea, 1985; Pomp, Stephan; Lantz, Mattias; Rakopoulos, Vasileios; Solders, Andreas; Al-Adili, Ali; Passoth, Elke; Prokofiev, Alexander; Andersson, Peter; Hjalmarsson, Anders; Bedogni, Roberto; Bortot, Davide; Esposito, A.; Gentile, A.; Gómez-Ros, J.M.; Introini, Maria Vittoria; Pola, Andrea; Gorelov, Dmitry; Penttilä, H.; Moore, I.D.; Rinta-Antila, Sami; Kolhinen, V.S.; Eronen, T.
Source
European Physical Journal A. 53(173)
Subject
Language
English
ISSN
1434-6001
1434-601X
1434-601X
Abstract
A white neutron source based on the Be(p,nx) reaction for fission studies at the IGISOLJYFLTRAP facility has been designed and tested. 30 MeV protons impinge on a 5mm thick water-cooled beryllium disc. The source was designed to produce at least 1012 fast neutrons/s on a secondary fission target, in order to reach competitive production rates of fission products far from the valley of stability.The Monte Carlo codes MCNPX and FLUKA were used in the design phase to simulate the neutron energy spectra. Two experiments to characterise the neutron field were performed: the first was carried out at The Svedberg Laboratory in Uppsala (SE), using an Extended-Range Bonner Sphere Spectrometer and a liquid scintillator which used the time-of-flight (TOF) method to determine the energy of the neutrons; the second employed Thin-Film Breakdown Counters for the measurement of the TOF, and activation foils, at the IGISOL facility in Jyväskylä (FI). Design considerations and the results of the two characterisation measurements are presented, providing benchmarks for the simulations.