RADIOACTIVITY OF THORIUM AND FEASIBILITY OF IN VIVO THORIUM MEASUREMENTS

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Tabulations of the radioactivity in the thorium series decay chain and a discussion of the radioactivity variations possible in non-equllibrium conditions of the decay chain are presented. Experimental data indicate that the daughters of thorium within the human lung may be measured by in vivo gamma spectrometry and related to Th/sup 232/ content for thorium quantities as small as 9 mug, if the activity ratio of Th/sup 232/: Th/sup 228/ is knowu for the deposited material. Two crystel gamma coincidence measurements of pairs of the simultaneously emitted gamma quanta from the daughters are suggested as a promising approach to thorium ... continued below

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Cofield, R.E. November 11, 1959.

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Description

Tabulations of the radioactivity in the thorium series decay chain and a discussion of the radioactivity variations possible in non-equllibrium conditions of the decay chain are presented. Experimental data indicate that the daughters of thorium within the human lung may be measured by in vivo gamma spectrometry and related to Th/sup 232/ content for thorium quantities as small as 9 mug, if the activity ratio of Th/sup 232/: Th/sup 228/ is knowu for the deposited material. Two crystel gamma coincidence measurements of pairs of the simultaneously emitted gamma quanta from the daughters are suggested as a promising approach to thorium in vivo measurements. (auth)

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  • Other Information: Orig. Receipt Date: 31-DEC-60

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  • Report No.: Y-1280
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/4199670 | External Link
  • Office of Scientific & Technical Information Report Number: 4199670
  • Archival Resource Key: ark:/67531/metadc877630

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  • November 11, 1959

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  • Sept. 21, 2016, 2:29 a.m.

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Cofield, R.E. RADIOACTIVITY OF THORIUM AND FEASIBILITY OF IN VIVO THORIUM MEASUREMENTS, report, November 11, 1959; United States. (digital.library.unt.edu/ark:/67531/metadc877630/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.