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Decay branching ratio of main and excited state of $^{11}$B in the interaction of neutron and $^{10}$B in energy between 1 and 6 MeV is studied. The experiment is performed at the photoneutron source of the Institute for Nuclear Research of Russian Academy of Sciences. Neutron detector based on the $^{10}$B-layer which served as both target and cathode of wire chamber for detecting secondary nucleus ionization losses is used [1]. Trigger of neutron lower than 0.5 MeV energy is suppressed by both cadmium filter and high threshold setting.
Branching ratio of $n + ^{11}\text{B} \rightarrow ^{7}\text{Li} + ^{4}\text{He}$ and $n + ^{11}\text{B} \rightarrow ^{7}\text{Li} + ^{4}\text{He}+\gamma$ reactions is determined using pulse height spectra and correlation from two detector gap signals together with $^{7}$Li and $^{4}$He ionization loss simulation taking into account kinematics of each reaction.
- S. Potashev, A. Drachev, Yu. Burmistrov, S. Karaevsky, A. Kasparov, V. Ponomarev, and G. Solodukhov. Hybrid boron-10 gaseous detector for slow and fast neutron simultaneous detection. EPJ Web of Conferences V.231, P.05010 (2020).
