Measurement of H-3(d,n)He-4 neutron spectrum by means of time-of-flight technique for a fast neutron generator

The energy spectrum of neutrons produced from the H-3(d,n) He-4 reactions h as been determined by using the double scintillator time-of-flight techniqu e. Although the technique has limitations in determining the energy and its spread, due to the short flight path of the experimental setup, it has bee n shown that the determination of primary neutron energy spectrum down to 0 .5 MeV, with the expected structures caused by multiple scattering and deut eron build-up effects, is easily achievable for a low energy accelerator op erated in continues mode. (C) 2001 Elsevier Science Ltd. All rights reserve d.