IEC 61452:1995

FOREWORD
INTRODUCTION
Clause
1 Scope and object
2 Normative references
3 Definitions and symbols
   3.1 Special word usage
   3.2 Definitions
   3.3 Symbols
4 Installation of instrumentation
5 Peak analysis and calibration procedures
   5.1 Peak-finding algorithm
   5.2 Peak position and area measurement
   5.3 Energy calibration
   5.4 Efficiency calibration measurement
        5.4.1 Standardization for specific radionuclides
        5.4.2 Detector efficiency as a function of
              energy
        5.4.3 Efficiency function or look-up table
6 Gamma-ray measurements with Ge spectrometers
   6.1 Measurement of gamma-ray energies
   6.2 Measurement of gamma-ray emission rates and
        radionuclides activities
        6.2.1 Subtraction of interference peaks in the
              background
        6.2.2 Radioactive decay
        6.2.3 Pulse pile-up (random summing)
        6.2.4 Cascade (coincidence summing)
        6.2.5 Attenuation corrections
7 Performance tests of the spectrometry system
   7.1 Multichannel-analyzer clocks
   7.2 D.C. offset and pole-zero settings
   7.3 Energy calibration
   7.4 System efficiency and resolution
   7.5 Pulse pile-up (random summing)
8 Performance tests of the analysis software
   8.1 Test of automatic peak-finding algorithm
   8.2 Test of independence of peak-area from the gross
        peak-height to continuum-height ratio
   8.3 Test of the doublet-peak finding and fitting
        algorithms
9 Verification of the entire analysis process
   9.1 Assessment of the magnitude of cascade summing
   9.2 Absolute error in the relative full-energy-peak
        efficiency
   9.3 Accuracy of the full-energy-peak efficiency
10 Radionuclide identification
11 Uncertainties and uncertainty propagation
Annexes
A Procedures for characterization of a Ge gamma-ray
   spectrometer
B Measurement of peak position, net area and their
   uncertainties
C Equations for the correction of cascade gamma-ray
   summing
D Construction of shields for Ge spectrometers
E Bibliography
Tables
Figures

Establishes methods for the calibration and use of germanium spectrometers for the measurement of gamma-ray energies anad emission rates over the energy range from 59 keV to approximately 3 000 keV and the calculation of sources activities