Radionuclides in two rised peat profiles collected from Kościeliska Valley in the Tatra Mountains

Gaca, P., Tomankiewicz, Ewa, Mietelski, J.W., Grabowska, S. and Kubica, B. (2006) Radionuclides in two rised peat profiles collected from Kościeliska Valley in the Tatra Mountains. Journal of Radioanalytical and Nuclear Chemistry, 267 (2), 443-448. (doi:10.1007/s10967-006-0068-y).

Abstract

The activities of 239+240Pu, 238Pu, 241Am, 90Sr, 137Cs, 40K, 228Ac were measured as well as the activity ratios of 228Th to 232Th and 230Th to 232Thin samples of two rised peat profiles collected from Kocieliska Valley in the Western Tatra Mountains in 2002 and 2003. Results show somedifferences in the vertical distribution of examined radionuclides. Calculated cumulated deposition in the deeper profile is equal to 6.9±0.2 kBq/m2(137Cs), 168±11 Bq/m2 (239+240Pu), 4.3±0.8 Bq/m2 (238Pu), 33±3 Bq/m2 (241Am) and 607±11 Bq/m2 (90Sr). Therefore, it seems that radiostrontiumwas partially removed from the examined part of the profile. The peat grow-up rate was estimated from the position of the maxima of the verticaldistribution of radiocesium and plutonium (6 to 8 mm/y), and from the determination of the vertical distribution of 210Pb (1.25 mm/y). Thediscrepancy seems to be due to the solubility of lead.

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