Open AccessMeasurement of the neutron spectrum by the multi-sphere method using a BF3 counter
Author(s) -
Rahim Khabaz,
Miri Hakimabad
Publication year - 2011
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/ntrp1102140k
Subject(s) - neutron temperature , bonner sphere , neutron , physics , spheres , detector , range (aeronautics) , monte carlo method , shadow (psychology) , optics , neutron source , proportional counter , neutron detection , attenuation , computational physics , materials science , nuclear physics , neutron cross section , mathematics , psychology , statistics , astronomy , composite material , psychotherapist
The multi-sphere method, a neutron detection technique, has been improved with a BF3 long cylindrical counter as a thermal detector located in the center of seven spheres with a diameter range of 3.5 to 12 inches. Energy response functions of the system have been determined by applying the MCNP4C Monte Carlo code of 10-8 MeV to 18 MeV. A new shadow cone has been designed to account for scattered neutrons. Although the newly designed shadow cone is smaller in length, its attenuation coefficient has been improved. To evaluate the system, the neutron spectrum of a 241AM-Be source has been measured