TY - JOUR
T1 - Distribution characteristics of natural radionuclides at some spa districts in Japan
AU - Koga, T.
AU - Takemura, T.
AU - Nojiri, S.
AU - Morishima, H.
AU - Inagaki, M.
AU - Tanaka, Y.
AU - Mifune, M.
PY - 2005/2
Y1 - 2005/2
N2 - In Japan, there are many high-level natural radiation areas such as Masutomi spa (Yamanashi pref.), Misasa spa (Tottori pref.), Ikeda spa (Shimane pref.), and Tamagawa spa (Akita pref.), etc. The Uranium and thorium decay series and K-40 are widely distributed as the sources of terrestrial radiation. Their concentrations are influenced by geological features and are nonuniform. We carried out a study of the behavior and distribution of natural radionuclides in the surrounding soils of high-level natural radiation spa areas by γ-ray energy spectrometry using a Ge(INT) diode detector. It was found that the Pb-212(Th)/Pb-214(U) ratios fluctuated widely in the same areas, of which Tamagawa spa and Masutomi spa were typical.
AB - In Japan, there are many high-level natural radiation areas such as Masutomi spa (Yamanashi pref.), Misasa spa (Tottori pref.), Ikeda spa (Shimane pref.), and Tamagawa spa (Akita pref.), etc. The Uranium and thorium decay series and K-40 are widely distributed as the sources of terrestrial radiation. Their concentrations are influenced by geological features and are nonuniform. We carried out a study of the behavior and distribution of natural radionuclides in the surrounding soils of high-level natural radiation spa areas by γ-ray energy spectrometry using a Ge(INT) diode detector. It was found that the Pb-212(Th)/Pb-214(U) ratios fluctuated widely in the same areas, of which Tamagawa spa and Masutomi spa were typical.
KW - Masutomi spa
KW - Natural radionuclide
KW - Pb-212(Th)/Pb-214(U) ratio
KW - Soil
KW - Tamagawa spa
KW - γ-Ray spectrometry
UR - http://www.scopus.com/inward/record.url?scp=33646464169&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646464169&partnerID=8YFLogxK
U2 - 10.1016/j.ics.2004.11.085
DO - 10.1016/j.ics.2004.11.085
M3 - Article
AN - SCOPUS:33646464169
SN - 0531-5131
VL - 1276
SP - 295
EP - 296
JO - International Congress Series
JF - International Congress Series
ER -