The theoretical basis for gamma densitometry of soil by transmission is reviewed. It is
stressed that the familiar exponential‐inverse square law applies only to primary radiation …

A general review of gamma-ray attenuation methods used for determining water content and
bulk density of soil is reported in this bulletin. These methods are most applicable to …

Soil samples from strata down to 164 m were studied with respect to the linear attenuation
coefficient (μ) and the mass absorption coefficient (μ/ϱ) for gamma rays and their variation …

Experimental and/or theoretical estimates are presented concerning (i) attenuation within
the sample of beta and gamma radiation from the soil,(ii) the gamma dose within the sample …

In this paper, a generalization of the {gamma}-ray transmission method which is useful for
measurements on soil samples, for example, is presented. The correction factor, f, is given …

Calculations are presented for natural γ-ray spectra in equilibrium inside homogeneous,
infinite soils. The influences of moisture and nature of soils are investigated. The ratio of the …

Subject: N22120*-Environmental & Earth Sciences-Geology & Hydrology-Natural
Radioactivity; DETERMINATION; EMISSION; FISSION PRODUCTS; GAMMA RADIATION; …

A gauge for in situ measurements of soil densities with an accuracy of about 1 per cent
which can be used at depths down to 1000 ft is described. A caesium-137 γ-ray source is …

The output of the ratemeter is registered by a recorder with a zero suppression possibility of
0 to 100 per cent of the ratemeter signal. Parallel to the ratemeter is a digital counter read …

The development of a meter which can be used to determine soil moisture and density
rapidly, independent of soil type, is described. The moisture meter is based on fast neutron …