The neutron-neutron scattering length from a complete experiment on the 3H(d, 2n)3He reaction at 8.45 MeV

The spectrum of the time-differences between the two neutrons from the ³H(d, 2n)³He reaction detected by two plastic scintillators situated at 0.2 and 2.0 m from the target was measured at 0°. The spectrum was compared with a Jost-function final-state interaction enhancement factor and yielded a value of 16.2 ± 1.2 fm for a_n?n, the neutron-neutron scattering length.