NEUTRON ACTIVATION ANALYSIS Meaning and
Definition
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Neutron Activation Analysis (NAA) is a highly sensitive and non-destructive analytical technique used for determining the elemental composition of a sample. It is based on the principle of inducing nuclear reactions by bombarding a material with neutrons.
In NAA, a sample is exposed to a neutron source, typically a nuclear reactor. The neutrons penetrate the material and cause nuclear reactions by either capturing the neutrons or being scattered by the atomic nuclei of the sample. This interaction leads to the formation of radioactive isotopes within the sample.
These radioactive isotopes, often known as activation products, emit characteristic gamma rays as they decay. By measuring the energy and intensity of these gamma rays, scientists can identify and quantify the elements present in the sample. The gamma ray spectroscopy technique used in NAA allows for simultaneous analysis of multiple elements with high precision and accuracy.
One of the major advantages of NAA is its capability to detect and measure elements present in very low concentrations, even in the parts per billion or parts per trillion range. It is also a non-destructive technique, meaning that the sample remains unaltered and can be further analyzed or preserved for future studies. NAA finds applications in various fields such as archaeology, environmental science, forensic analysis, geology, and material characterization.
Common Misspellings for NEUTRON ACTIVATION ANALYSIS
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