Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 69(3): 121-127 (2020)

資料Materials (Data)

宇宙線測定データを解析して推定した木造天守閣および櫓の重量Weights of Wooden Castle Towers and Turrets Estimated from Analyses of Cosmic Ray Measurement Data

1放射線地学研究所Radiation Earth Science Laboratory

2宇陀ジオサークルUda Geoscience Club

受付日:2019年9月21日Received: September 21, 2019
受理日:2019年11月20日Accepted: November 20, 2019
発行日:2020年3月15日Published: March 15, 2020


Cosmic ray dose rate measurements were carried out inside 13 wooden castle towers and 5 turrets using a NaI(Tl) spectrometer. Approximating a shape of each tower or turret with a multi-cylindrical shell, a density and thickness of the shell were calculated using an inside/outside ratio of dose rate. The density was multiplied by a volume of the shell in order to obtain its weight. Input data required for the model analysis for each castle tower or turret, i.e., elevation, total floor space, surface area, outside and inside dose rates, were listed along with the corresponding density and thickness of the shell and its weight derived by the model calculation. Comparison with other model calculations and examples of actual weight measurements showed the validity of the calculated results described in this report.

Key words: cosmic ray; dose rate; NaI(Tl) scintillation detector; wood; castle tower; turret; weight

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