低能质子回旋加速器内部束流测量探头的感生放射性

Induced radioactivity in interior beam probe for low-energy proton cyclotron

为满足回旋加速器内部束流测量探头产生低放射性的要求,通过理论分析和蒙特卡罗模拟方法,研究了11 MeV,50μA质子束轰击铜探头产生的感生放射性,得到各种感生放射性核素的饱和放射性活度,并对结果进行了比较。分析结果表明,采用软件FLUKA进行蒙特卡罗模拟,核反应考虑完全,可同时计算不同照射时间下的直接和间接感生放射性,计算结果准确。应用该方法,质子束轰击不同测量探头产生的感生放射性可以得到详细和准确的分析和预测。

Both theoretical analysis and Monte-Carlo simulation on induced radioactivity in the copper measuring probe irradiated by proton beams with energy of 11 MeV and intensity of 50 μA have been demonstrated.Saturated activities of various kinds of radioactive nuclides obtained by these two methods were compared.The comparison indicates that the Monte-Carlo method conducted by software FLUKA can provide good simulation accuracy and complete consideration in nuclear reaction,and both the direct and indirect radioactivity under different irradiation time can be calculated simultaneously.The method can also provide accurate analysis and prediction on the induced radioactivity in different measuring probes under proton irradiation,which will provide a reference for design,exchange and disposal of the probes.