The methodology of characterization of neutron leakage field from PET production cyclotron for experimental purposes
The methodology of characterization of neutron leakage field from PET production cyclotron for experimental purposes
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实验用 PET 生产回旋加速器中子泄漏场表征方法
DOI：
10.1016/j.nima.2019.162374
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
V. Rypar
中科院分区：
文献类型：
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作者：
M. Kostal;E. Losa;M. Schulc;J. Simon;Z. Matěj;M. Antoš;Š. Vadják;M. Cuhra;F. Cvachovec;F. Mravec;F. Brijar;Tomáš Czakoj;V. Rypar
在18 O（p，n）18F反应生产放射性药物用18F同位素的过程中，泄漏中子大多被认为是一种废物。基于回旋加速器的中子源的利用可能是令人感兴趣的应用，因为其平均能量相对较高并且发射率相当强。因此，它的使用可能是有用的，在许多领域的中子为基础的研究。本文的目的是确定的方法和它的后续使用的特性的二次中子场泄漏的18 O富集的H2 O靶在IBA旋风18/9。实验表征是基于独立的方法，即质子反冲法使用的芪闪烁探测器和中子活化分析与选定的IRDFF材料的就业。利用MCNP 6程序模型和FENDL-3、TENDL-2017（p，n）反应核数据库计算了中子场特性。已发现计算模型或多或少存在一些差异，因此建议使用实验表征作为唯一方法。
During the production of 18 F isotope for radiopharmaceuticals in 18 O (p, n) 18 F reactions, the leakage neutrons are mostly considered as a waste product. The utilization of a cyclotron based neutron source might be an interesting application because its average energy is relatively high and emissivity is quite strong. Thus its use might be useful in many fields of neutron based research. This paper aims to define the methodology and its following use for the characterization of the secondary neutron field leaking from 18 O enriched H 2 O target in IBA Cyclone 18/9. Experimental characterization is based on the employment of independent methods, namely the proton recoil method using a stilbene scintillation detector and neutron activation analysis with selected IRDFF materials. Neutron field characteristics were also tested by calculation in the standard MCNP6 code model and using FENDL-3, TENDL-2017 nuclear data libraries for (p, n) reactions. The calculation models have been found as discrepant in some quantities more or less, thus it is recommended to use experimental characterization as a sole method.