Charged Particle Ejection
The case of neutron-induced charged particle reactions is not so common, but there are some neutron-induced charged particle reactions, that are of importance in the reactivity control and also in the detection of neutrons.
The most important charged particle reactions in nuclear reactor physics are reactions of thermal neutrons with boron nuclei (rather with 10B nuclei). In nuclear industry boron is commonly used as a neutron absorber and a neutron converter (in neutron radiation detectors) due to its high neutron cross-section of isotope 10B along entire neutron energy spectrum. Its (n,alpha) reaction cross-section for thermal neutrons is about 3840 barns (for 0.025 eV neutron). Examples of neutron-induced charged particle reactions are shown below:
Examples of (n,alpha) reactions
This reaction is the most important (n,alpha) reaction of isotope 10B with thermal neutrons. This reaction can be used as in the case of neutron absorbers (chemical shim, burnable absorbers or control rods), and in the case of neutron converters (neutron detectors), because its cross-section is very high and produces energetic alpha particles.
This is a reaction allowing detection of neutrons. The reaction cross-section for thermal neutrons is σ = 925 barns and the natural lithium has abundance of 6Li 7,4%.
Source: JANIS (Java-based Nuclear Data Information Software); The JEFF-3.1.1 Nuclear Data Library