Sodium Iodide Detector Analysis Software (SIDAS)

Technical Report · Sun Jun 01 04:00:00 EDT 1986

OSTI ID:5326112

Mitchell, D J

The Sodium Iodide Detector Analysis Software (SIDAS) comprises a set of Fortran programs used to calibrate scintillation detector response functions, synthesize spectra for gamma ray sources, and analyze gamma spectra of unknown isotopic compositions. The SIDAS software was originally written to analyze spectra recorded with sodium iodide (NAI) detectors, but it has also been applied successfully to bismuth germanate (BGO) detectors. Spectra calculated by SIDAS are based on analytical functions employing a set of parameters that are determined during calibration to give the best match between calculated and measured spectra. The spectra include the contributions from: the photopeaks, single and double escape peaks, iodine x-ray escape peaks, annihilation photons created outside the detector, Compton and backscatter continuua, bremsstrahlung radiation, and lead x-rays created near the detector. The effects of coincident and random pile-up events are also computed. This document describes how the software is used and discusses some of the computational methodology. 17 figs., 6 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA). Monitoring Systems Div.
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5326112
• Report Number(s): SAND-86-1473; ON: DE86014943
• Country of Publication: United States
• Language: English

Related Subjects

440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BGO DETECTORS
COMPUTER CODES
COMPUTER GRAPHICS
DATA ACQUISITION SYSTEMS
DATA ANALYSIS
FORTRAN
GAMMA SPECTRA
MEASURING INSTRUMENTS
NAI DETECTORS
PROGRAMMING LANGUAGES
RADIATION DETECTORS
S CODES
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
SPECTRA