Given the considerable overlap of the water-pumping-injection single-sphere neutron spectrometer (WSNS) response functions, a Cs2 6 LiYCl6:Ce(CLYC) detector, which can record both neutrons and gamma-rays, is used to detect thermal neutrons moderated by water in each shell layer of the WSNS and 2.223 MeV prompt gamma-rays emitted from the (n, γ) reaction between thermal neutron and hydrogen in water to construct an n–γ response matrix jointly, and then the inversion neutron energy spectrum by the response matrix. Firstly, the n–γ response matrix of WSNS is calculated from 10–9 to 20 MeV using the Monte Carlo FLUKA code. Subsequently, the resolving power of the n–γ response matrix is determined in the range of 10–8 to 10 MeV using the approach of Backus and Gilbert. Compared with the neutron response matrix, the resolving power of the n–γ response matrix is improved by 4% on average in the whole energy range. Finally, the neutron spectra of Pu–Be source and boron neutron capture therapy (BNCT) feld are unfolded by the self-adaptive diferential evolution neutron spectrum unfolding algorithm (SDENUA). The spectrum quality factor (QS) of Pu–Be and BNCT obtained by the n–γ response matrix is 0.2155 and 0.3087, respectively, which is reduced by 38.64% and 69.09% compared to the neutron response matrix.
Given the considerable overlap of the water-pumping-injection single-sphere neutron spectrometer (WSNS) response functions, a Cs2 6 LiYCl6:Ce(CLYC) detector, which can record both neutrons and gamma-rays, is used to detect thermal neutrons moderated by water in each shell layer of the WSNS and 2.223 MeV prompt gamma-rays emitted from the (n, γ) reaction between thermal neutron and hydrogen in water to construct an n–γ response matrix jointly, and then the inversion neutron energy spectrum by the response matrix. Firstly, the n–γ response matrix of WSNS is calculated from 10–9 to 20 MeV using the Monte Carlo FLUKA code. Subsequently, the resolving power of the n–γ response matrix is determined in the range of 10–8 to 10 MeV using the approach of Backus and Gilbert. Compared with the neutron response matrix, the resolving power of the n–γ response matrix is improved by 4% on average in the whole energy range. Finally, the neutron spectra of Pu–Be source and boron neutron capture therapy (BNCT) feld are unfolded by the self-adaptive diferential evolution neutron spectrum unfolding algorithm (SDENUA). The spectrum quality factor (QS) of Pu–Be and BNCT obtained by the n–γ response matrix is 0.2155 and 0.3087, respectively, which is reduced by 38.64% and 69.09% compared to the neutron response matrix.