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Temporal variations of 7Be, 210Pb and 137Cs in moss samples over 14 month period.

机译:苔藓样品中7Be,210Pb和137Cs在14个月内的时间变化。

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摘要

Concentrations of (210)Pb, (7)Be and (137)Cs in moss samples were continuously measured, using low-background HPGe spectrometer at Novi Sad, Serbia (45 degrees 14'45''N, 19 degrees 51'35''E). Weekly data collected over 14 month period from January 2007 to March 2008 are presented and discussed. Measured values of (7)Be activity concentrations in dry moss samples are ranged from 201 to 920 Bq/kg showing prominent increase in summer and autumn season. Data for (210)Pb, ranged from 347 to 885 Bq/kg do not show such trend. The average concentration of (137)Cs is 8.9 Bq/kg. It is shown that yield of (7)Be can be estimated using average values of activity concentrations. Precipitation amount and duration of precipitation are measured and their possible influence on activity concentrations measured in moss samples was considered.
机译:使用低背景HPGe光谱仪在塞尔维亚的诺维萨德(45度14'45''N,19度51'35'连续测量苔藓样品中(210)Pb,(7)Be和(137)Cs的浓度'E)。介绍并讨论了从2007年1月到2008年3月的14个月期间收集的每周数据。干燥苔藓样品中的(7)Be活性浓度的测量值范围为201至920 Bq / kg,在夏季和秋季均显着增加。 (210)Pb的数据在347至885 Bq / kg的范围内没有显示出这种趋势。 (137)Cs的平均浓度为8.9 Bq / kg。结果表明,(7)Be的收率可以通过活性浓度的平均值来估算。测量沉淀的量和沉淀的持续时间,并考虑它们对苔藓样品中所测活性浓度的可能影响。

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