Abstract
The outer surface bark of many trees is an excellent monitoring source of fallout radionuclides. The accumulation and retention of these pollutants is evident by the presence of /sup 106/Ru, /sup 125/Sb, /sup 144/Ce and /sup 155/Eu in the outer layer of bark from many trees surveyed during this study. The accumulation and retention of these and other radionuclides suggest that tree bark is an ecosystem monitoring resource that should be exploited for these and possible other environmental pollutants. Therefore, the emphasis of this study was a broad survey of the detectability of gamma-ray emitting radionuclides in and on tree bark rather than a narrow quantitative study.
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