The irradiation facility of the University of Pisa (UNIPI) is a neutron and gamma irradiation facility of the University of Pisa used for calibration purposes and to evaluate detectors and dosemeters for mixed neutron and gamma fields. The facility consists of a fairly large room (5.0 × 7.8 × 2.5 m³) with concrete walls and roof designed to minimise radiation scattering. Sealed neutron and gamma radionuclide sources are stored in the facility for calibration and test purposes. In order to perform accurate response measurements, this study applied a methodology of general validity to assess the neutron and gamma room scatter contributions (albedo) to the fluence and to the ambient dose equivalent rates. The assessment was done for the standard irradiation points of the facility, using detailed Monte Carlo simulations and considering several source-to-wall and source-to-detector distances.

中文翻译：

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辐射设施中的中子和伽马反照率评估

比萨大学（UNIPI）的辐照设施是比萨大学的中子和伽马辐照设施，用于校准目的和评估混合中子和伽马场的探测器和剂量计。该设施包括一个相当大的房间（5.0×7.8×2.5 m ³），其混凝土墙和屋顶的设计可最大程度地减少辐射散射。密封的中子和γ放射性核素源存储在设施中，用于校准和测试目的。为了进行准确的响应测量，本研究采用了一种通用有效性的方法来评估中子和伽马室散射对通量和环境等效剂量率的贡献（反照率）。使用详细的蒙特卡洛模拟并考虑了多个源到墙和源到探测器的距离，对设施的标准照射点进行了评估。