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Abstract

 

This article in SSSAJ

  1. Vol. 26 No. 2, p. 137-140
     
    Received: Apr 6, 1961
    Accepted: Apr 28, 1961


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doi:10.2136/sssaj1962.03615995002600020013x

Gamma Scintillation Spectrometry of Soil and Tree Leaves1

  1. J. L. Mortensen2

Abstract

Abstract

A two-crystal spectrometer was developed for gamma scintillation spectrometry of low-level environmental samples. Response to gamma-rays and resolution, efficiency, and background characteristics of the spectrometer were determined.

Spectra of gamma emitters in Canfield silt loam sampled in August, 1960, showed the presence of thorium + daughters, uranium + daughters, K40, Cs137 (190 mc. per mile2), Ru106-Rh106 (885 mc. per mile2) and Ce144-Pr144 (1275 mc. per mile2). Spectra of tree leaves obtained in the fall of 1959 and counted in June, 1960 showed the presence of Ba140-La140, K40, Ru106-Rh106, Zr95-Nb95, Cs137, Ce144-Pr144. Leaves sampled in the fall of 1960 contained K40, Cs137, Ru106-Rh106 and Ce144-Pr144.

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