Observations of Backscattered Gamma-Rays in a Surface Density Gauge
- 1 September 1965
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 4 (9)
- https://doi.org/10.1143/jjap.4.667
Abstract
Energy spectra of Cs137 gamma-rays, backscattered from materials of various densities into a surface gauge of the soil density meter, were measured by means of NaI scintillation counter. Changes in the spectra of scattered gamma-rays caused by varying the density were inferred from calculations for Compton single scattering. The density-intensity relationships were obtained by calculations and experiments for several energy regions with several different source-to-detector separations. The plots of measured gamma-ray intensities from water and paraffine deviate from the density-intensity curve. The deviations depend on the source-detector separation and also on the response of the detector to gamma-rays. The gamma-ray intensities, observed for densities from 0.44 to 2.47 g/cm3, fit well into a simple experimental equation.Keywords
This publication has 3 references indexed in Scilit:
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- Reflection and transmission of gamma radiation by barriers: Monte-Carlo calculation by a collision-density methodJournal of Research of the National Bureau of Standards, 1955
- Monte Carlo Calculation of Gamma-Ray Albedos of Concrete and AluminumJournal of Applied Physics, 1955