Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] abmb_v1_0.gz(18 Kbytes)|
|Manuscript Title: Computer-assisted analysis of gamma-ray spectra.|
|Authors: G.D. Atkinson Jr., J.B. Whitworth, S.J. Gage|
|Program title: NAA|
|Catalogue identifier: ABMB_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 2(1971)40|
|Programming language: Fortran.|
|Computer: CDC 6600.|
|Operating system: UT1.|
|RAM: 17K words|
|Word size: 60|
|Keywords: Nuclear physics, Photopeak identification, Qualitative analysis, Gamma-ray spectra, Isotope, Lagrangian interpolation, Heavy ion, Activity detection.|
|Classification: 17.6, 17.7.|
Nature of problem:
The program automatically analyzes multi-element gamma-ray spectra obtained with high resolution detectors. Peak energies and net areas are determined, and possible sources of individual gamma-rays are given.
Peaks are identified by slope changes in the spectrum. Peak statistics are determined by Covell's method, and peak identification is performed by table look-up.
The gamma-ray spectra cannot contain more than 1024 channels, and the energy calibration curve must be a polynomial of degree 5 or less. The look-up table cannot contain more than 1000 gamma-ray energies, entered in ascending order.
The NAA option to search a gamma-ray reference table simplifies multi- component trace element analysis. The short field length and running time allow rapid turn around in both batch processing and remote time sharing systems.
To compile the program takes 5 s of central processor time. To run a typical 1024 channel spectrum takes 2-3 s.
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