Charged particle reactions are usually associated with formation of a compound nucleus, which is excited to a high energy level, that such compound nucleus can eject a new charged particle while the incident neutron remains in the nucleus. After the new particle is ejected, the remaining nucleus is completely changed, but may or may not exist in an excited state depending upon the mass-energy balance of the reaction. This type of reaction is more common for charged particles as incident particles (such as alpha particles, protons, and so on).
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:
See also: Application of boron based materials
See also: Detection of neutrons