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Oak Ridge Associated Universities, Oak Ridge, Tennessee
ABSTRACT
An instrument and a counting method for accurate radioassay of large, intact, biological samples are described. Within wide geometric limits the instrument and counting method requires neither a standard sample shape, standard volume nor uniformity of radioisotope distribution within the sample. Accuracy of the radioassays is limited primarily by counting statistics even when samples as large as 500 gm with a dimension of 15 cm or less are used.
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