neutron activation analysis


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neutron activation analysis

the analysis of elements in a specimen, performed by exposing it to neutron irradiation. The irradiation converts many elements in the specimen to radioactive forms that can be identified by their emissions of radiation. The method has limited application to human and animal studies.

neutron activation analysis

A method for identifying and measuring the concentrations of the chemical elements in a large and complex sample of material.

Method
A sample is rendered radioactive by bombarding it with neutrons, charged particles or gamma rays, making the nuclei of the different elements unstable and radioactive, and putting them in a higher energy state. Each of the now-radioactive isotopes in the sample gives off a characteristic signature (e.g., alpha particles, gamma rays), which indicates the type and concentration of the elements in the sample.
References in periodicals archive ?
Ahmad, Instrumental neutron activation analysis of estuarine sediment as a proposed reference material for environmental studies, Geostandards Newsletter, 25(1), 137 (2001).
alpha spectro- metry, gamma spectrometry and neutron activation analysis in the measurement of thorium [85].
In Neutron Activation Analysis (NAA), samples are bombarded with thermal neutrons, which render radioactive by the capture of one extra neutron.
Bullet identification: A case of a fatal hunting accident resolved by comparison of lead shot using instrumental neutron activation analysis, Journal of Forensic Sciences (1992) 37(2):657-662.
Radiochemical neutron activation analysis method for the determination of tin, arsenic, copper, and antimony for the forensic comparison of bullet lead specimens, Journal of Radioanalytical Chemistry (1983) 77(1):235-240.
Analysis of lead shot: A comparison of analyses using atomic absorption spectrophotometry and neutron activation analysis, Journal of the Canadian Society of Forensic Science (1969) 2(4):95-103.
New studies in forensic neutron activation analysis, Journal of Radioanalytical and Nuclear Chemistry (1987) 114(2):265-273.
Trace element analysis by atomic absorption spectrometry and neutron activation analysis in the investigation of shooting cases, Journal of the Canadian Society of Forensic Science (1973) 6:55-77.
5] were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), carbon fraction analysis, and neutron activation analysis (NAA).
Total elemental analysis by neutron activation analysis and X-ray fluorescence analysis.
Nuclear Reactor Program: Neutron Activation Analysis.
Due to inconsistencies of analyses by other methods Roche Bay magnetite ore samples were analyzed by Instrumental Neutron Activation Analysis (INAA), in order to obtain an accurate determination of the elemental composition including Precious Metal credits of these iron ore samples.