neutron activation analysis


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

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 ?
In prompt gamma neutron activation analysis a material is irradiated with energetic neutrons.
BioPAL's core technology is stable isotope labeling of functional probes via neutron activation analysis - a technology that promises to significantly streamline the drug discovery process and improve clinical methods for measuring organ function.
This interpretation was partly based on Neutron Activation Analysis (NAA) and petrographic examination (thin section analysis occasionally backed up by electron microprobe study of individual mineral grains) of pottery sherds from ten sites: four in southern Mesopotamia (Ur, Tell al Ubaid, Eridu and Uruk (Warka)), three in Saudi Arabia (Ain Qannas, Dosariyah and Abu Khamis), one in Bahrain (Al Markh), and two in Qatar (al Da'asa and Ras Abaruk).
The sherds examined by Neutron Activation Analysis in 'Seafaring merchants of Ur?
BioPAL's core technology is stable isotope labeling of functional probes and neutron activation analysis -- a technology that promises to significantly streamline the drug discovery process and improve clinical methods for measuring organ function.
Neutron activation analysis (NAA) remains the most widely used method, followed by X-ray techniques (XRF, XRD, SEM/EDS), but the use of inductively-coupled plasma (ICP) spectroscopy is on the rise.
6, 1997-- Borealis Exploration Limited (CDN:BSXC, NASD:BOREF) announces initial Instrumental Neutron Activation Analysis (INAA) of a Roche Bay ~40% grade banded magnetite sample showing values of 6.
AntOro has received the Neutron Activation analysis results for the last 600 geochemistry soil samples taken during phase I of the exploration program.