Karadeniz O, Yaprak G
Physics Department, Faculty of Arts and Science, Dokuz Eylül University, 35160 Tinaztepe, Izmir, Turkey.
Appl Radiat Isot. 2007 Dec;65(12):1363-7. doi: 10.1016/j.apradiso.2007.04.001. Epub 2007 Apr 5.
Using a high-resolution gamma-spectrometer system, the activity concentrations of 7Be, 137Cs, 40K and 226Ra were determined in the pine needles. Activity concentrations of the concerned radionuclides in the needle samples were as follows: 7Be, 24.6+/-2.40 to 210+/-7.21 Bq kg(-1), 40K, 23.5+/-12.4 to 287+/-15.6 Bq kg(-1), 226Ra, 0.44+/-0.12 to 12.3+/-2.18 Bq kg(-1), and 137Cs, 0.61+/-0.30 to 2.29+/-0.38 Bq kg(-1). It is found that the frequency distributions obtained for 7Be and 137Cs can be fitted to a normal distribution, and for 40K and 226Ra can be fitted to a log-normal distribution.
使用高分辨率伽马能谱仪系统，测定了松针中(^{7}Be)、(^{137}Cs)、(^{40}K)和(^{226}Ra)的活度浓度。针叶样品中相关放射性核素的活度浓度如下：(^{7}Be)，(24.6\pm2.40)至(210\pm7.21 Bq kg^{-1})；(^{40}K)，(23.5\pm12.4)至(287\pm15.6 Bq kg^{-1})；(^{226}Ra)，(0.44\pm0.12)至(12.3\pm2.18 Bq kg^{-1})；(^{137}Cs)，(0.61\pm0.30)至(2.29\pm0.38 Bq kg^{-1})。结果发现，(^{7}Be)和(^{137}Cs)的频率分布可拟合为正态分布，(^{40}K)和(^{226}Ra)的频率分布可拟合为对数正态分布。
