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Radiation Protection Dosimetry Advance Access originally published online on August 3, 2004
Radiation Protection Dosimetry 2004 112(2):323-327; doi:10.1093/rpd/nch396
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Radiation Protection Dosimetry Vol. 112, No. 2 © Oxford University Press 2004; all rights reserved

Scientific Note

Radioactivity level in Chinese building ceramic tile

L. Xinwei

College of Tourism and Environment, Shaanxi Normal University, Xi'an, Shaanxi 710062, People's Republic of China

Corresponding author: luxinwei{at}snnu.edu.cn

The activity concentrations of 226Ra, 232Th and 40K have been determined by gamma ray spectrometry. The concentrations of 226Ra, 232Th and 40K range from 158.3 to 1087.6, 91.7 to 1218.4, and 473.8 to 1031.3 Bq kg–1 for glaze, and from 63.5 to 131.4, 55.4 to 106.5, and 386.7 to 866.8 Bq kg–1 for ceramic tile, respectively. The measured activity concentrations for these radionuclides were compared with the reported data of other countries and with the typical world values. The radium equivalent activities (Raeq), external hazard index (Hex) and internal hazard index (Hin) associated with the radionuclides were calculated. The Raeq values of all ceramic tiles are lower than the limit of 370 Bq kg–1. The values of Hex and Hin calculated according to the Chinese criterion for ceramic tiles are less than unity. The Raeq value for the glaze of glazed tile collected from some areas are >370 Bq kg–1.


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