title: Response improved for neutron long counter.
abstract: A low-sensitivity neutron long counter was designed as a standard directional flow detector to monitor neutron fluence reference values of an accelerator-based 14-MeV D-T neutron source with yield of 10(13) n s(-1). The energy response over 6 MeV was improved using a tungsten radiator, which acts as an energy converter via the (n, xn) reaction. Different parameters were optimised to flatten the neutron energy response over a wide energy range. A simulation of the designed neutron long counter was performed using the Monte Carlo codes SuperMC. The response function is relatively flat in the energy range of 1 keV-20 MeV. The results show that the maximal relative variation is ∼7.8 %.
authors.affiliation: Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, China yanan.li@fds.org.cn.
authors.forename: Yanan
authors.initials: Y
authors.lastname: Li
authors.affiliation: Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, China.
authors.forename: Taosheng
authors.initials: T
authors.lastname: Li
authors.affiliation: Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Song
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui, China.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Mazunga
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D015233:Models, Statistical; D009010:Monte Carlo Method; D009502:Neutrons; D010315:Particle Accelerators / Q000295:instrumentation*; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity