山林地陆地γ辐射空气吸收剂量率测量

The measurement of absorbed dose rates in air from terrene γ-ray in mountain forest

介绍了 Na I就地γ谱仪在海洋性气候山林地进行的陆地γ辐射空气吸收剂量率测量。用 Na I探头的响应矩阵解析就地 γ谱的方法 ,得到 0 .0 5～ 3Me V间不同能量的光子在空气中的注量率谱 ,进而求得空气吸收剂量率。同时 ,作为参考 ,用高纯锗 γ谱仪对就地测量点的土壤进行核素分析 ,间接估算 γ剂量率。通过比较 。

The measurement of absorbed dose rates in air from terrene γ radiation using NaI(Tl) in situγ ray spectrometry in mountain forest was carried out. The distribution of the photon fluence in energy from 0.05～3MeV was approximated by applying an spectrum unfolding procedure, and then the absorbed dose rate in air was obtained. As a reference, the radionuclide concentrations in the in situ measurement site soils were analyzed in laboratory using a HPGe γ ray spectrometry. A reasonable agreement was found between in situ results and radioactivity characters of measurement sites.