Open AccessA study of possibility to design a fast neutron spectrometer based on the organic scintillator with surrounding materials
Author(s) -
Senada Avdic,
P. Marinković,
Alma Osmanovic,
Izet Gazdić,
Šejla Hadžić,
Damir Demirović
Publication year - 2014
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp1401001a
Subject(s) - scintillator , spectrometer , neutron , detector , materials science , neutron detection , neutron temperature , monte carlo method , liquid scintillation counting , computational physics , nuclear physics , bonner sphere , physics , neutron cross section , optics , radiochemistry , chemistry , statistics , mathematics
Sci en tific pa per DOI: 10.2298/NTRP1401001A This pa per deals with the de sign of a novel spec trom e ter of fast neu trons in nu clear safe guards ap pli ca tions based on the liq uid or ganic scintillator EJ-309 with ma te ri als of dif fer ent thick-ness sur round ing the de tec tor. The in ves ti ga tion was per formed on the sim u lated data ob-tained by the MCNPX-PoliMi nu mer i cal code based on the Monte Carlo method. Among the var i ous ma te ri als (poly eth yl ene, iron, alu minum, and graph ite) in ves ti gated as lay ers around the scintillator, poly eth yl ene and iron have shown the most prom is ing char ac ter is tics for eval-u a tion of fast neu tron en ergy spec tra. The sim u lated pulse height dis tri bu tions were summed up for each en ergy bin in the neu tron en ergy range be tween 1 MeV and 15 MeV in or der to ob tain better count ing sta tis tics. The un folded re sults for monoenergetic neu tron sources ob-tained by a first or der of Tikhonov reg u lar iza tion and non-lin ear neu ral net work show very good agree ment with the ref er ence data while the eval u ated spec tra of neu tron sources con-tin u ous in en ergy fol low the trend of the ref er ence spec tra. The pos si ble ad van tages of a novel spec trom e ter in clude a less num ber of in put data for pro cess ing and a less sen si tiv ity to th