重离子核反应中的中子辐射局部屏蔽

LOCAL SHIELDING OF NEUTRONS FOR HEAVY ION INTERACTION

以3.9×10^(11)离子/s·100 MeV/u^(12)C 离子轰击厚 Cu 靶的重离子反应为例,计算了用单一混凝土、Fe 作为局部屏蔽材料和用不同厚度的 Fe 加混凝土作局部屏蔽时中子剂量当量率的变化,确定了达到2.5×10^(-2)mSv/h 中子剂量当量率限值的屏蔽厚度。

In the paper, we calculated the neutron dose equivalent rate for the heavy ion interaction of 3.9× 10^(11) ions/s ^(12)C ion with energy of 100 MeV/u bombarding a thick Cu target under local shielding conditions of single Fe or concrete shielding and Fe+concrete compound shielding, determined the shielding thickness for the neutron dose equivalent rate limit H=2. 5×10^(-2) mSv/h.