6 0 0 0 OA I. 原子力事故後の環境中外部被ばく線量の測定・評価に関する研究
1 0 0 0 OA 積雪による地殻γ線線量率の減衰
- 著者
- 長岡 鋭 坂本 隆一 斎藤 公明 堤 正博 森内 茂
- 出版者
- 日本保健物理学会
- 雑誌
- 保健物理 (ISSN:03676110)
- 巻号頁・発行日
- vol.23, no.4, pp.309-315, 1988 (Released:2010-02-25)
- 参考文献数
- 15
- 被引用文献数
- 3 6
In order to clarify the diminution characteristics of terrestrial gamma ray exposure rate due to snow cover, measurements were performed on the ground with and without snow cover. The diminution factors observed were 0.36-0.17 for 12-23g/cm2 of water equivalent of the snow cover. According to a calculation by the Monte Carlo method, the corresponding diminution factors were 0.32-0.16. They agreed well as a whole, while the fluctuation of the diminution factors based on the measured exposure rate were fairly large. The fluctuation is deemed to be due to the inhomogeneity in the distribution of the snow cover as well as the gamma ray field. The fluctuation is expected to decrease with increase in the degree of their homogeneity.