PRACTICAL METHODS FOR ATTAINING CONSTANT SENSITIVITY AND DENSITY IN INDUSTRIAL RADIOGRAPHY

Authors
  1. Roberts, K.G.
Corporate Authors
Naval Research Establishment, Halifax NS (CAN)
Abstract
Five aspects of radiographic procedure have been studied, the results of which have made it possible to attain consistently the best sensitivity over a wide rnage of thicknesses and material densities in a minimum time. It has been shown that for most routine examinations, it is preferable to use a 0.005-in. front and a 0.015-in.back lead intensifying screen so that a constant film density of 2.5 units can be achieved. A flat penetrameter is preferred on the source side of the film and a lower limit is placed on the source to film distance according to the specimen thickness. To obtain a uniform film density with the optimum radiographic sensitivity, the tube kilovoltage should be varied with specimen thickness and material density. This technique offers the maximum differential absorption within the limits of the x-ray unit.
Date of publication
31 Dec 1955
Number of Pages
8
Reprinted from
AFS Symposium on Non-Destructive Testing, 1955, 6p
DSTKIM No
57-12242
CANDIS No
147644
Format(s):
Hardcopy

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