ASTM E803-91(2002)
Historical Standard: ASTM E803-91(2002) Standard Test Method for Determining the L/D Ratio of Neutron Radiography Beams
SUPERSEDED (see Active link, below)
ASTM E803
1. Scope
1.1 This method defines an empirical technique for the measurement of the effective collimation ratio, L/D , of neutron radiography beams. The technique is based upon analysis of a neutron radiographic image and is independent of measurements and calculations based on physical dimensions of the collimator system. The values derived by this technique should be more accurate than those based on physical measurements, particularly for poorly defined apertures.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
E748 Practices for Thermal Neutron Radiography of Materials
E1316 Terminology for Nondestructive Examinations
Keywords
beam collimation; L/D ratio; neutron radiography; radiographic unsharpness; umbral shadow;
ICS Code
ICS Number Code 19.100 (Non-destructive testing)
DOI: 10.1520/E0803-91R02
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