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

The energy spectrum of neutrons produced from the 3H(d,n) 4He reactions has been deter- mined by using the double scintillator time-of-¯ight technique. Although the technique has limitations in determining the energy and its spread, due to the short ¯ight path of the experimental setup, it has been shown that the determination of primary neutron energy spectrum down to 0.5 MeV, with the expected structures caused by multiple scattering and deuteron build-up e€ects, is easily achievable for a low energy accelerator operated in con- tinues mode