Sppecific Radioactivity of Europium-152 in Roof Tiles Exposed to Atomic Bomb Radiation in Nagasaki
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概要
- 論文の詳細を見る
Specific radioactivities of residual europium (Eu)-152 were measured in six roof tile samples exposed to the Nagasaki atomic bomb at two locations. The ground distances of the two locations from the hypocenter are 1020 m and 1060 m. In order to obtain reliable data, Eu-enriched samples (from 207 to 855 mg) were prepared by separating Eu from each roof tile sample (from 1 to 2 kg). For the major aliquot of the Eu-enriched sample, residual radioactivity of ^^152 Eu was measured using a low-energy photon spectrometer. For the minor aliquot of the Eu-enriched sample, Eu content was determined by neutron activation analysis. Results of the specific radioactivity (^^152 Eu/Eu, Bq mg^-1 ) corrected to the time of bombing were in a range from 0.080 to 0.446. Although the measured values showed some scattering, they are moderately consistent with the calculated values by the DS86 methodology, i.e. the average ratio of the calculated to measured values is 1.3±0.8.
- 日本放射線影響学会の論文
著者
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Nakanishi Takashi
Department Of Applied Chemistry Faculty Of Engineering Nagasaki University
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Nakanishi T
Department Of Chemistry Faculty Of Science Kanazawa University
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MIWA KENTAROH
Department of Chemistry, Faculty of Science, Kanazawa University
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OHKI RIKA
Department of Chemistry, Faculty of Science, Kanazawa University
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Ohki Rika
Department Of Chemistry Faculty Of Science Kanazawa University
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Miwa Kentaroh
Department Of Chemistry Faculty Of Science Kanazawa University
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- Sppecific Radioactivity of Europium-152 in Roof Tiles Exposed to Atomic Bomb Radiation in Nagasaki
- Specific radioactivities of Eu-152 in roof tiles exposed to the Nagasaki atomic bomb.