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The response of various hydrogen-containing scintillators irradiated by neutrons was investigated. The monoenergetic neutrons were obtained in the d(d,n)3He reaction using different angular configurations of experiment with coincidental registration of neutron and 3He. In the experiment, the target of deuterated polyethylene was irradiated by deuteron beam with energy of 15 MeV at U-120 accelerator of Skobel’tsyn Institute of Nuclear Physics, MSU. Changing the angles of neutron and 3He detection allowed us to obtain the spectral light response of various neutron detectors on monoenergetic neutrons in the energy range of 6–14 MeV. We obtain also the values of the neutron detection efficiency for different detectors in this energy range.