Barci G, Dalmasso J, Ardisson G
Laboratorie de Radiochimie, Université de Nice, France.
Sci Total Environ. 1988 Mar;70:373-87. doi: 10.1016/0048-9697(88)90270-7.
The radioactivity of various terrestrial vegetation leaves characteristic of Mediterranean countries has been measured after the Chernobyl accident. In addition, we paid particular attention to lichens and seaweed which are considered as bioindicators of radioactive contamination. Most measurements were performed non-destructively using both coaxial and planar HPGe detectors. For odd mass radionuclides having low energy lines, such as 125Sb or 141Ce the sensitivity of the planar HPGe detector is better than the coaxial detector. The concentration of long-lived fission nuclides remaining three months after the accident were found to be enhanced in needle form leaves and in lichens. The seaweed Sphaerococcus exhibits a strong specific activity for iodine and ruthenium elements and poor concentration for caesium nuclides. The activity ratios of different isotopes of the same element measured in vegetation samples agree well with values found in airborne aerosols by other authors. The activation nuclide 110mAg is found in all samples with the same ratio 110mAg/137Cs = (1.0 +/- 0.2).10(-2) as in the soil deposition.
切尔诺贝利事故之后，对地中海国家具有代表性的各类陆生植物叶片的放射性进行了测量。此外，我们特别关注了地衣和海藻，它们被视为放射性污染的生物指示物。大多数测量是使用同轴和平面高纯锗探测器以非破坏性方式进行的。对于具有低能谱线的奇数质量放射性核素，如125Sb或141Ce，平面高纯锗探测器的灵敏度优于同轴探测器。发现事故三个月后，针叶状叶片和地衣中长寿命裂变核素的浓度有所增加。海藻Sphaerococcus对碘和钌元素表现出很强的比活度，而对铯核素的浓度较低。在植被样本中测量的同一元素不同同位素的活度比与其他作者在空气气溶胶中发现的值非常吻合。在所有样本中都发现了活化核素110mAg，其110mAg/137Cs的比值与土壤沉积物中的相同，为(1.0±0.2)·10⁻² 。
