Influence of resonances on the 11B(n, γ)12B reaction rate. Capture to the excited states of 12B.

Based on the framework of the modified potential cluster model (MPCM), with orbital states classified using Young diagrams, we consider the possibility of prediction absentee of experimental data for the total cross-sections of the radiative neutron capture on 1 1 B to the first excited state of 1 2 B at 0.95314 MeV (2 + ), to the second excited state of 1 2 B at 1.67365 MeV (2−), and prediction absentee of experimental data for the total cross-sections to the third and fourth excited states of 1 2 B at 2.6208 MeV (1−) and 2.723 MeV (0 + ), for a reaction energy of 10 meV to 7 MeV. We calculate the reaction rate for a temperature range of 0.01–10.0 T 9 on the basis of the obtained cross-sections, which take into account resonances up to 5 MeV. We then demonstrate that low-lying resonances have a significant impact on the reaction rate of capture. An approximation for the calculated reaction rate is derived based on an analytical formula. [ABSTRACT FROM AUTHOR]