@article{oai:muroran-it.repo.nii.ac.jp:00008382, author = {沖野, 典夫 and OKINO, Michio and 大隅, 徹 and OSUMI, Toru and 江本, 尚広 and EMOTO, Naohiro}, journal = {室蘭工業大学紀要, Memoirs of the Muroran Institute of Technology}, month = {Nov}, note = {application/pdf, This survey of the environmental gamma rays was made in a littoral region of Volcano Bay and around Mount Usu. The dose rate levels of the environmental gamma rays were estimated from the survey results that measured with a portable germanium detector and a spectrometer. A car-born survey and a spot survey were made by these measurement systems installed in a car. The variation of the total absorbed dose rate was found to be originated mainly by the variation of the Th-232 series nuclides. In some situations, it was found to be caused by the variation of the U-238 series nuclides. A half year after an eruption of Mount Usu, large and random variations of a K-40 dose rate was measured at some points around a volcanic crater. Although 2 years after the eruption, it was confirmed those variation had become fairly steady., 特集 : 「環境調和型社会を指向して」}, pages = {59--63}, title = {噴火湾沿岸地域における環境放射線の調査および評価}, volume = {53}, year = {2003}, yomi = {オキノ, ミチオ and オオスミ, トオル and エモト, ナオヒロ} }