ID 109833
Title Transcription
フクシマ ゲンシリョク ハツデンショ ノ ジコ カラ ミタ ホウシャセイ ドウイ ゲンソ ト ホウシャセン
Title Alternative
Radioisotope and Radiation through the Fukushima Daiichi Nuclear Disaster
Author
Honda, Eiichi Department of Oral & Maxillofacial Radiology, Institute of Health Biosciences , The University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Keywords
ベクレル(Bq)
グレイ(Gy)
シーベルト(Sv)
Content Type
Journal Article
Description
The words“ radiation and radioactivity” have been become famous after the Fukushima Daiichi nuclear disaster. Alfa, beta, gamma and neutron rays irradiated from radioisotopes are well known to the world. Alfa and beta rays have weak penetration. Alfa and beta rays are stopped by a sheet of paper and a thin aluminum plate, respectively. And those are taken into account at internal exposure because all energy from those rays is absorbed in the surrounding tissues. If DNA strand in the cell is broken by the energy absorbed, some radiation hazard may occur. The units of radiation became also famous. Becquerel (Bq), Sievert (Sv) and Sv/h are addressed under a leaflet for the pubic by public office and citizen has been to monitor the radiation dose contained in food and water. In the early stage 131-I (iodine) having about 8 days half-life period was emitted into the air and many people were exposed. Recently the 131-I at that time was decayed but two types of radioactive cesium 134-Cs and 137-Cs remained. Because 134-Cs and 137-Cs have about 2 years and 30 years halflife period respectively and emit beta and gamma ray, no radiation effect will require hundred years. Therefore I hope that many people will acquire the greater knowledge of radiation.
Journal Title
四国歯学会雑誌
ISSN
09146091
NCID
AN10050046
Publisher
四国歯学会
Volume
25
Issue
2
Start Page
77
End Page
79
Sort Key
77
Published Date
2013-01-31
EDB ID
FullText File
language
jpn
TextVersion
Publisher
departments
Oral Sciences