Interaction of intermediate-energy neutrons with /sup 3/He

The time-of-flight method in the IBR-30 pulsed reactor has been used to measure the total cross section and scattering cross section for neutrons of /sup 3/He in the energy range 1--200 keV. The experimental data are compared with calculations in various theoretical approaches. Values of the singlet and triplet neutron scattering lengths of /sup 3/He are obtained: a/sub s/ = (6.53 +- 0.32)-i(4.450 +- 0.003), a/sub t/ = 3.62 +- 0.15.