Neutron yield of the reactions Li6(t,n) and Li7(t,n)

Abstract

The differential cross section is determined for the formation of neutrons at an angle of 0 ° in the reactions Li6(t,n) and Li7(t, n) in the 0.175–2.4 Mev triton energy range. In the reaction Li6(t,n) resonance in the neutron yield is observed at Et = 1.875 Mev, corresponding to a Be9 excitation level of 18.936 Mev. Two resonances are detected in the neutron yield of the reaction Li7(t, n): at Et = 0.765 Mev and Et = 1.735 Mev, which indicates the presence of Be10 nucleus excitation levels of 17.78 and 18.46 Mev, respectively. The cross section of the reaction Li6(t, n) in resonance is dσ/dΩ(0 °)res = 37.2 mb/sr; for the reaction Li7 (t, n) the cross section at the first resonance is dσ/dΩ(0 °)res = 95 mb/sr; at the second resonance dσ/dΩ(0 °)res = 159 mb/sr. The angular distributions of neutrons are given for the interval of angles 0–135 ° (every 15 °) for triton energies of 0.358, 0.559, 1.006, 1.218, 1.370, 1.572, 2.123 Mev. The total cross section for the formation of neutrons at Et = 2.123 Mev in the reaction Li6 (t,n) is equal to 324±32.3 mb in the reaction Li7 (t, n) to 1332±83.3 mb.