We have developed a highly automated program for the analysis of data from neutron activation analysis (NAA). Spectral analysis is done using almost any common MCA employing regions of interest or peak-fitting routine of the user's choice. A wide variety of data entry possibilities is available, from fully manual data entry to an automatic mode where the user enters all necessary data in a tabular format and the computer calculated the results. The resulting data can be automatically imported into a LOTUS 1-2-3 compatible spreadsheet for statistical analysis. All of the features of previous versions of NADA have been retained. These include a variety of methods for dead-time correction, correction of spectral and nuclear interferences, and a complete, concise hard-copy output. Future improvements include a routine which will automatically select regions-of-interest for spectra in ORTEC Maestro, thus reducing the processing time needed.
We have developed a PC based program for neutron activation data analysis using the FORTRAN and C languages. The routines are based on creating files associated with conventional ORTEC hardware and output software. The main features of the program include radionuclide identification, and the use of semi-automatic integration or the peak fitting SAMPO routine. Other developments are hard and soft copy records for detailed sample identification and particular irradiation, decay and counting procedures. Flux variations, high deadtime corrections, counting geometries, spectral and nuclear interferences, as well as uranium fission interferences are also automatically accounted for. The data output includes concentration values in %, ppm, g or ppb units with associated errors, while detection limits for each individual sample are indicated. Further data output can easily be generated which can be imported to most spreadsheet programs for various statistical uses. A future implementation to the program will include batch-file processing and automated self-absorption calculations for geological samples.
Authors:S. Landsberger, D. Wu, S. Vermette, and W. Cizek
Fifty air filters with fine and coarse fractions were prepared from NIST 2710 contaminated soil. Eighteen pairs were made and sent to laboratories of the Coordinated Research Program (CRP) on Applied Research on Air Pollution Using Nuclear-Related Analytical Techniques for elemental determination. The results of this intercomparison are discussed in this paper.