ASTM International - ASTM E803-91(2013)
Standard Test Method for Determining the L/D Ratio of Neutron Radiography Beams
Organization: | ASTM International |
Publication Date: | 1 June 2013 |
Status: | inactive |
Page Count: | 7 |
ICS Code (Non-destructive testing): | 19.100 |
significance And Use:
4.1 The quality of a neutron radiographic image is dependent upon many factors. The L/D ratio is one of those factors and constitutes a numerical definition of the geometry of the neutron... View More
scope:
1.1 This test 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.
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