The measurement of the ${}^6$Li(n, t)${}^4$He reaction cross-section in the energy range of 4.25-7.50 MeV

The measurement of the total cross-section of the ${}^6$Li(n, t)${}^4$He reaction was carried out over the energy range of 4.25-7.50 MeV by a time-of-flight method relative to the cross-section of the ${}^{235}$U fission. The Cs${}_2$LiYCl${}_6$:Ce based scintillation detector was used as a lithium containing target. The scintillation detector was placed in an axially symmetrical geometry relative to a monitor fission chamber containing ${}^{235}$U layers. The pulsed quasi-monoenergetic neutron beam from the ${}^2$H(d,n)${}^3$He reaction was used as a neutron source. The total systematic uncertainty in the experiment was 4.6-6.7% with the statistical uncertainty of 2.0-3.7%. The obtained data do not support the evaluated cross-section of the ${}^6$Li(n, t)${}^4$He reaction from the ENDF-B/VIII.0 library. At the same time, the average difference between the evaluated cross-section from the JENDL-5.0 library and the experimental data obtained in this work also exceeds the total systematic uncertainty of the measurements.