@article{oai:repo.qst.go.jp:00048060,
 author = {Omori, Y. and Tokonami, S. and Sahoo, S.K. and Ishikawa, T. and Sorimachi, A. and Hosoda, M. and Kudo, H. and Pornnumpa, C. and K., Nair R. and Jayalekshmi, P.A. and Sebastian, P. and Akiba, S. and サフー サラタ クマール and 石川 徹夫},
 issue = {1},
 journal = {Journal of Radiological Protection},
 month = {Jan},
 note = {In order to evaluate internal exposure to radon and thoron, concentrations
for radon, thoron, and thoron progeny were measured for 259 dwellings
located in high background radiation areas (HBRAs, outdoor external dose:
3–5 mGy y−1) and low background radiation areas (control areas, outdoor
external dose: 1 mGy y−1) in Karunagappally Taluk, Kerala, India. The
measurements were conducted using passive-type radon-thoron detectors and
thoron progeny detectors over two six-month measurement periods from June
2010 to June 2011. The results showed no major differences in radon and
thoron progeny concentrations between the HBRAs and the control areas. The
geometric mean of the annual effective dose due to radon and thoron was
calculated as 0.10 and 0.44 mSv, respectively. The doses were small, but not
negligible compared with the external dose in the two areas.},
 pages = {111--126},
 title = {Radiation dose due to radon and thoron progeny inhalation in high-level natural radiation areas of Kerala, India},
 volume = {37},
 year = {2017}
}