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- Flattop is a benchmark critical assembly that is used to study the nuclear characteristics of uranium-233, uranium-235, and plutonium-239 in spherical geometries surrounded by a relatively thick natural uranium neutron reflector. Flattop assemblies are used to measure neutron activation and reactivity coefficients. Since the neutron energies gradually decrease in the reflector, experiments may be run in various energy spectra based on the location in which they are placed. (en)
- 平顶(Flattop)是一台临界质量检测装置，用于研究包裹在球形天然铀反射器中的铀-233、铀-235和钚-239的核特性。 平顶组件用于测量中子活化和反应性指数，由于反射器中的中子能量逐渐减少，因此，可根据所放置的位置在不同的能量光谱中进行实验. (zh)
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- Flattop is a benchmark critical assembly that is used to study the nuclear characteristics of uranium-233, uranium-235, and plutonium-239 in spherical geometries surrounded by a relatively thick natural uranium neutron reflector. Flattop assemblies are used to measure neutron activation and reactivity coefficients. Since the neutron energies gradually decrease in the reflector, experiments may be run in various energy spectra based on the location in which they are placed. (en)
- 平顶(Flattop)是一台临界质量检测装置，用于研究包裹在球形天然铀反射器中的铀-233、铀-235和钚-239的核特性。 平顶组件用于测量中子活化和反应性指数，由于反射器中的中子能量逐渐减少，因此，可根据所放置的位置在不同的能量光谱中进行实验. (zh)
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- Flattop (critical assembly) (en)
- 平顶 (临界组件) (zh)
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