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含硼聚乙烯中子防护材料Boron polyethylene
含硼聚乙烯中子防护材料Boron polyethylene是一种添加硼的聚乙烯HDPE复合屏蔽材料,硼含量根据不同需求定量添加2%~70%。除金属硼外,还可添加碳化硼、三氧化二硼、碳化锂、金属铅粉等来增强聚乙烯板的防护中子屏蔽伽马射线的能力。其中硼对中子的反应截面较大,可将快中子和热中子慢化为慢中子,而聚乙烯是高氢材料,氢元素对慢中子有明显的减弱能力,额外添加铅粉,铅元素对伽马γ辐射线有很好的屏蔽能力。Among them, boron has a large reaction cross-section to neutrons, which can slow down fast neutrons and thermal neutrons into slow neutrons, while polyethylene is a high-hydrogen material, and hydrogen has obvious attenuation ability to slow neutrons. With the addition of lead powder, lead has a good shielding ability to gamma-ray radiation.
含硼聚乙烯中子防护材料Boron polyethylene已广泛应用于核辐射、中科院、航空、医疗等领域用于中子束准直器、核试验用样品罐、中子捕及器及核反应堆的控制棒材料。
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