含硼聚乙烯是一种相对廉价的中子防护材料,对其中子防护特性已进行过一维基准 实验。与其他中子防护材料一样,该材料在中子的作用下产生γ射线。相对于防护中子而言,γ射线是二级剂量。 而在含硼聚乙烯球中,主要是硼起吸收作用。硼对低能中子的反应截面比较大,在还没有发生氢的反应之前低能中子基本已被硼完全吸收,含硼聚乙烯在质量百分比为10﹪、厚度为15cm时,含硼聚乙烯对中子的防护效果已达到要求。在此基础上再增加含硼量或者厚度,中子的积分泄露量基本不发生变化。
Boron-containing polyethylene (bpe) is a relatively cheap neutron shielding material. As with other neutron shielding materials, the material is used by neutrons to generate corrosion rays. Compared to neutron shielding, safer radiation is a second-order dose. In the polyethylene ball containing boron, it is mainly boron that absorbs. Boron response to low energy neutron cross section is larger, before has not happened hydrogen reaction basic boron has been completely absorbed, low energy neutron boron polyethylene in the quality percentage of 10 ﹪, thickness is 15 cm, boron polyethylene protective effect of neutron has reached the requirement. On this basis, the amount or thickness of boron is increased, and the integral leakage of neutrons is basically unchanged.
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