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IEEE N42.14 1999

$72.58

American National Standard for Calibration and use of germanium spectrometers for the measurement of gamma-ray emission rates of radionuclides

Published By Publication Date Number of Pages
IEEE 1999 82
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New IEEE Standard – Active. Methods for the calibration and use of germanium spectrometers for the measurement of gamma-ray energies and emission rates over the energy range from 59 keV to approximately 3000 keV, and for the calculation of source activities from these measurements, are established. Minimum requirements for automated peak finding are stated. Methods for measuring the full-energy peak efficiency with calibrated sources are given. Performance tests that ascertain the prop-er functioning of the Ge spectrometer and evaluate the limitations of the algorithms used for locating and fitting single and multiple peaks are described. Methods for the measurement of, and the correction for pulse pileup are suggested. Techniques are recommended for the inspection of spec-tral- analysis results for large errors resulting from summing of cascade gamma rays in the detector. Suggestions are provided for the establishment of data libraries for radionuclide identification, de-cay corrections, and the conversion of gamma-ray rates to decay rates.

PDF Catalog

PDF Pages PDF Title
1 Title
3 Introduction
Participants
5 CONTENTS
7 1. Overview
1.1 Scope
8 1.2 Purpose
2. References
9 3. Definitions
13 4. Installation of instrumentation
14 5. Calibration procedures
5.1 Energy calibration
5.2 Efficiency calibration
17 6. Gamma-ray measurements with Ge spectrometers
6.1 Peak-finding algorithm
6.2 Peak position and area measurement
6.3 Measurement of gamma-ray energies
6.4 Subtraction of background peaks
18 6.5 Measurement of gamma-ray emission rates
21 6.6 Calculation of nuclide activities
25 7. Performance tests of the spectrometry system
7.1 MCA clocks
7.2 DC offset and pole-zero settings
7.3 Energy calibration
26 7.4 System efficiency
7.5 System resolution
8. Verification of the analysis process
27 8.1 Test of automatic peak-finding algorithm
28 8.2 Test of independence of peak-area from the gross peak-height-to-baseline- height ratio
30 8.3 Test of the doublet-peak finding and fitting algorithms
31 8.4 Pulse pileup (random summing)
34 8.5 Assessment of the magnitude of coincidence summing
37 8.6 Bias in the relative full-energy peak efficiency
8.7 Accuracy of the full-energy peak efficiency
38 8.8 Radionuclide identification
8.9 Identification through multipeak analysis and correction for interference from other radionuc…
39 9. Uncertainties and propagation of uncertainty
42 Annex A
45 Annex B
68 Annex C
71 Annex D
79 Annex E
IEEE N42.14 1999
$72.58