For the challenge of traditional fabrication method for 137 Cs and 60 Co aero plane source in aero gamma spectrometer calibration, and ensure the uniformity of the plane, the modern grid lattice spraying technology was adopt, radioactive standard solution of 137 Cs and 60 Co were quantitative drip on the bottom liner filter paper individually, heat sealing after dried, fixed the plastic package slice on the trapezoidal aluminium plate with epoxy resin. 8 blocks of aluminium plate compose plane source of regu-lar hexagon side length of 1m. The expanded uncertainly (k =2) of plane source is 4% , the heterogeneity is better than 10% .%用于校准航空γ谱仪的137 Cs,60 Co 大面积航空平面源对传统的涂刷制源技术提出了挑战,为确保平面上的均匀性,借鉴现代网格点阵喷涂技术,将137 Cs,60 Co 两种放射性标准溶液分别定量滴注在底衬滤纸上,晾干后热塑封并用环氧树脂将塑封片固定在梯形铝板上,由8块梯形铝板拼接为边长1m 的正六边形航空平面源。制备的航空平面源的扩展不确定度(k=2)为4%,不均匀性优于10%。
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