Russian Journal of Nondestructive Testing

, Volume 36, Issue 10, pp 772–777 | Cite as

Selection of energy in gamma absorption method of layer thickness measurements in two-layered components

  • O. I. Nedavnii
  • S. P. Osipov
Radiation Methods


Empirical formulas relating optimal energies at which the weighted average error in gamma-absorption thickness measurements of two-layered structures to the thicknesses of each layer over the range of 30 to 150 mm in terms of carbon have been suggested. The error in approximations of the informative parameter based on tables is within 10% when the error in the layer thickness is no higher than 2.5%. Calculations for some specific cases are given. Practical recommendations on applications of these results are given. On the base of the concept of a “broad optimum,” a generalizing equation relating basic parameters of the problem and allowing one to easily select optimal energies with an error sufficiently small for practical needs (no higher than 6% in the estimate of the weighted average of layer thickness measurements) has been derived.


Layer Thickness Atomic Number Nondestructive Test Optimal Energy Approximation Factor 
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Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • O. I. Nedavnii
    • 1
  • S. P. Osipov
    • 1
  1. 1.Tomsk State Academy of Architecture and ConstructionTomskRussia

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