Neutron activation is a process in nuclear physics and radiochemistry whereby stable or radioactive isotopes capture neutrons, leading to the formation of new isotopes. When a nucleus absorbs a neutron, it can become unstable, resulting in radioactive decay and the emission of radiation. This process is significant for several reasons: 1. **Isotope Production**: Neutron activation can be used to produce specific isotopes in a controlled manner.
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Neutron activation is the production of radioactivity by irradiating a material with neutrons. One route is neutron capture producing an unstable isotope; other nuclear reactions can also produce unstable atomic nuclei. A specimen's later radioactive decay provides a way to detect that a transformation occurred during irradiation. It does not by itself identify the product or reconstruct the incoming neutron energy distribution.
This makes neutron activation a useful bridge between an invisible radiation field and a delayed measurement. The neutron flux and collision cross-section determine production; radioactive decay and detection efficiency determine what remains observable later. Neutron activation buildup and decay keeps these stages separate.