Am–Be neutron sources are widely used in nuclear laboratories. It is important to design adequate shielding for Am–Be neutron sources, in order to protect experimenters from being irradiated by neutrons and their associated γ-rays. When designing shielding, it is also much desired for the source assembly to provide sufficient neutron moderation, and furnish access channels for both thermal and fast neutrons directly from the source. Such a neutron source assembly may be called a “neutron source experimental platform”. This paper presents the design details of an Am–Be neutron source experimental platform at Sichuan University. The experimental platform is designed to be a Φ 100 cm × 100 cm paraffin cylinder with the Am–Be source at the center. The paraffin cylinder is inside a 0.5 cm thick stainless-steel container lined with 2 cm thick borated polyethylene. The platform has multiple access channels for thermal neutrons, and one access channel for fast neutrons. The design calculations were performed with Geant4.

Am–Be中子源广泛用于核实验室。为Am-Be中子源设计适当的屏蔽非常重要，这样可以保护实验人员免受中子及其相关γ射线的照射。在设计屏蔽时，也非常需要源组件提供足够的中子缓和，并直接从源中为热中子和快速中子提供访问通道。这样的中子源组件可以被称为“中子源实验平台”。本文介绍了四川大学Am-Be中子源实验平台的设计细节。实验平台设计为Φ100cm×100 cm的石蜡瓶，以Am–Be离子源为中心。石蜡缸位于0内。5厘米厚的不锈钢容器内衬2厘米厚的硼酸化聚乙烯。该平台有多个用于热中子的通道和一个用于快速中子的通道。设计计算是使用Geant4进行的。