What does boron carbide mainly rely on for neutron absorption?

What does boron carbide mainly rely on for neutron absorption?
The neutron absorption performance of boron carbide is mainly realized by B10 in boron carbide. The neutron capture cross section of B10 is high, and the capture energy spectrum width is second only to a few elements such as gadolinium, samarium and cadmium. Due to the high neutron capture cross section of boron carbide, it has become a material of increasing interest in nuclear reactors.