|Appears in Collections:||Biological and Environmental Sciences Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Estimating and accounting for Cs-137 source burial through in-situ gamma spectrometry in salt marsh environments|
Sanderson, David C W
Scott, E Marian
|Citation:||Tyler A, Sanderson DCW & Scott EM (1996) Estimating and accounting for Cs-137 source burial through in-situ gamma spectrometry in salt marsh environments, Journal of Environmental Radioactivity, 33 (3), pp. 195-212.|
|Abstract:||The use of in-situ gamma ray spectrometry provides a means of rapidly estimating environmental radioactivity inventories. However, one of the principal limitations of this technique has been the influence of variations in vertical activity distribution on the observed photon fluence. This paper demonstrates that the quantification of the forward scattered ratio of the spectrum (Q) can be used to: (i) estimate the mean mass depth (β) of the vertical activity distribution within sediment profiles, and (ii) provide a calibration correction coefficient for in-situ gamma spectrometry in environments which exhibit variable and non-exponential activity distributions, such as salt marshes around the Irish Sea. This paper presents a successful application of a spectrally derived calibration correction coefficient to in-situ spectra from a salt marsh at Caerlaverock, Dumfries, SW Scotland, improving the correlation between soil core and in-situ derived activity estimates from r2 = 0.097 (uncorrected) to r2 = 0.801 (corrected). The scope for extending this approach to a wider range of environments, to airborne gamma spectrometry and to measurements of sedimentation rates is considered.|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|Affiliation:||Biological and Environmental Sciences|
Scottish Universities Environmental Research Centre
University of Glasgow
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