[en] The shape of the pulse-height response of a lithium-glass scintillator detector to neutrons has been measured in the range of neutron energies from 33 eV to 1.170 MeV using time-of-flight techniques. The variation of the width and mean pulse height of the distributions with neutron energy has been studied. An attempt has been made to interpret the spectra obtained at 'black resonances' in the time-of-flight spectrum. The significance of these results with regard to the 'black resonance' method of background determination is discussed and the need for further studies emphasised. (author)