ANSI N42.25 : 1997

Table of Contents

1 Overview
1.1 Scope
1.2 Special word usage
2 References
3 Definitions
3.1 Glossary
3.2 Symbols
3.3 Apparatus
4 Calibration
4.1 General
4.2 Detector plateau measurement
4.3 Discriminator settings
4.4 Background
4.5 Efficiency
5 Sources
5.1 Efficiency calibration sources
5.2 Check sources
6 Performance tests
6.1 Sources
6.2 Verification of counter background
6.3 Verification of alpha, beta, and guard plateau bias
        points
6.4 Verification of crosstalk (spillup/spilldown)
6.5 Effectiveness of guard detector
6.6 Verification of alpha and beta efficiency
6.7 Estimated uncertainty for gross alpha/beta screening
7 Determination of uncertainties and their propagation
8 Quality control and assurance
Annex A (informative) preparation of working standards from
        standard solutions
A.1 Simple volumetric preparation of planchet style sources
A.2 Simple gravimetric preparation of planchet style sources
Annex B (informative) guidance on measurement of samples
B.1 General precautions
B.2 Net count rates
B.3 Concentrations
B.4 Weight correction
B.5 Health physics smear samples
Annex C (informative) bibliography

Abstract

This standard provides a basis for the calibration and use of gas proportional counters with or without active guard detectors. This standard is intended for use by persons who have an understanding of the principles of gas proportional counting and are responsible for the development of the correct procedures for the calibration and use of these radiation measurement counters. References [B6], [B7], and [B11]1 provide information on the principles of operation of alpha/beta proportional counters.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN