Characterization of the neutron flux distribution at the Athens Tandem Accelerator NCSR “Demokritos”

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 269; no. 24; pp. 3266 - 3270
• Main Authors: Vlastou, R., Kokkoris, M., Diakaki, M., Constantinou, Ch, Kalfas, C.A., Kotrotsou, A., Lagoyannis, A., Lambrou, M., Loizou, V., Mara, E., Paneta, V., Provatas, G., Tsinganis, A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-12-2011
• Subjects: Accelerators; Activation energy; Computer simulation; Detectors; Energy use; Monte Carlo methods; Monte Carlo simulations; Multiple foil activation technique; Neutron activation; Neutron beams; Neutron flux; Unfolding codes; Unfolding codes; Monte Carlo simulations; Multiple foil activation technique; Neutron activation
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2011.04.015

Quasi-monoenergetic neutron beams, in the energy range 7–11.5
MeV, produced via the
2H(d,n) reaction, have been used at the 5.5
MV tandem T11/25 Accelerator Laboratory of NCSR “Demokritos”. The flux variation of the neutron beam is monitored with a BF
3 detector, while the absolute flux is obtained with respect to reference reactions. An investigation of the energy dependence of the neutron fluence has been carried out using two independent techniques: by a liquid scintillator BC501A detector and deconvolution of its recoil energy spectra performed by means of the DIFBAS code, as well as via the multiple foil activation technique in combination with the SULSA unfolding code. The neutron facility has also been characterized by means of Monte Carlo simulations with MCNP5.