A component of natural background radiation is exposure to galactic cosmic radiation (GCR). Annual GCR doses to the Australian public at ground levels and at altitudes of commercial domestic and international flights were estimated using the cosmic radiation dose modelling tool CARI-6. The annual population weighted average dose to Australians from GCR was estimated to be 342 μSv, of which 14.7 μSv (5%) was from domestic travel, 30.7 μSv (10%) was from international travel and 297 μSv (85%) of the dose was received at ground level. This study showed that critical population groups that are frequent flyers may exceed reference levels where additional awareness or protection should be considered. The GCR dose portion is ~25% of the total annual background radiation dose received by the Australian public.

中文翻译：

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澳大利亚公众的宇宙辐射暴露

自然背景辐射的一个组成部分是暴露于银河宇宙辐射（GCR）。使用宇宙辐射剂量建模工具 CARI-6 估计了澳大利亚公众在地面和商业国内和国际航班高度的年度 GCR 剂量。GCR 对澳大利亚人的年人口加权平均剂量估计为 342 μSv，其中 14.7 μSv（5%）来自国内旅行，30.7 μSv（10%）来自国际旅行，297 μSv（85%）来自在地面收到。这项研究表明，飞行常客的关键人群可能超过参考水平，应考虑额外的意识或保护。GCR 剂量部分约占澳大利亚公众每年接受的总背景辐射剂量的 25%。