The Gamma-Ray Back-Scattering Method

  • V. I. FerronskyEmail author
Part of the Springer Geophysics book series (SPRINGERGEOPHYS)


The functional relationship between scattering gamma-radiation and the density of a medium is the basis of this discussed method. The chief parameters that govern the practical usefulness of a given method, namely, its sensitivity to density changes and its resolution in depth are considered. These parameters depend on the probe length (axial distance between the source and the detector) and the gamma-ray energy. There are three different types of gamma-ray density gauges: surface-type probe, well-logging probe and a probe on the rod inserting directly into the soil. The principal difference between the various types is in the design of the measuring probe. A number of designs for surface-type probes are available. Mass-produced logging equipment has been widely used by geophysicists for density measurements in wells. At a relatively small depth (up to 25 m) the density can be conveniently determined by inserting a rod probe directly into the ground. Technological aspects of measurement and calibration are discussed.


Scattered Radiation Probe Length 137Cs Source Concrete Plate Ground Ground 
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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Water Problems Institute of the Russian Academy of SciencesMoscowRussia

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