A trial of in situ and static measurements of levels of radioactive cesium 137 on shallow rugged reefs lying close to the coastline of Fukushima
Autor: | Hiromi Shibata, Ken-Ichi Nogami, Fumie Suzuki, Nobuhiro Shiotani, Hideo Ohashi, Hisayuki Arakawa |
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Rok vydání: | 2018 |
Předmět: |
0106 biological sciences
Pollution In situ Water Pollutants Radioactive media_common.quotation_subject Potassium Potassium Radioisotopes chemistry.chemical_element Mineralogy 010501 environmental sciences Aquatic Science Potassium-40 Oceanography 01 natural sciences Japan Radiation Monitoring Fukushima Nuclear Accident Reef 0105 earth and related environmental sciences media_common geography Radionuclide geography.geographical_feature_category 010604 marine biology & hydrobiology chemistry Cesium Radioisotopes Caesium Environmental science Environmental Monitoring |
Zdroj: | Marine pollution bulletin. 145 |
ISSN: | 1879-3363 |
Popis: | With the use of an in situ and static method for gamma-ray measurements, levels of radioactive cesium 137 on shallow rugged reefs which lie between 37.3° N and 37.4° N, from the coastline of Fukushima to 141.06° E, at a depth of around 10 m were surveyed for the first time from May 2016 to December 2017. To confirm the contact between the detector and a surface of rock, we used a fact that potassium containing minerals are abundant and uniformly distributed in the area, and thus the strength of the photoelectric peak of natural radioactive potassium 40 is nearly constant over the area. We have found that the levels of radioactive cesium 137 varied from point to point within a range from 1 × 104 Bq/m2 to 6 × 104 Bq/m2. |
Databáze: | OpenAIRE |
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