在同位素生产应用中BLIP的二次中子特性

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-07-26 DOI:10.1016/j.nimb.2025.165815

Wilson Lin, Michael A. Skulski , Cathy S. Cutler, Dmitri G. Medvedev, Jonathan T. Morrell

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引用次数: 0

摘要

利用箔活化技术对布鲁克海文直线同位素发生器（BLIP）质子辐照后产生的快中子进行了表征，并与FLUKA蒙特卡罗模拟进行了比较。fluka模拟的中子通量使用国际反应堆剂量学和聚变文件（IRDFF-II）按照最大熵形式进行光谱调整，调整程序后的预测值与实验测量值一致，误差在9%以内。模拟了多种降色器配置，以评估改进快速(En >；在建议的中子靶位置（“n -槽”），20 MeV)的二次中子产率。n槽离质子降解器最近的配置产生了最高的快中子产率，钨降解器实现了最佳性能。假设在本工作中提出的优化目标-降解器配置，我们讨论了次生中子的潜在同位素生产机会。在大多数情况下，产率约为几个mCi。

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Characterizing secondary neutrons at BLIP for isotope production applications

Fast secondary neutrons created at the Brookhaven Linac Isotope Producer (BLIP) facility following proton irradiation were characterized by the foil activation technique and compared with FLUKA Monte Carlo simulations. The FLUKA-simulated neutron flux was spectrally adjusted following the maximum entropy formalism using the International Reactor Dosimetry and Fusion File (IRDFF-II), with predictions agreeing with experimental measurements to within 9 % following the adjustment procedure. A multitude of degrader configurations were simulated to assess the feasibility of improving the fast (E_n > 20 MeV) secondary neutron yield at the proposed neutron target position (“N-slot”). A configuration where the N-slot is closest to the proton degrader produced the highest fast neutron yield, with tungsten degraders achieving the best performance. Assuming the optimized target-degrader configuration proposed in this work, we discuss potential isotope production opportunities with secondary neutrons. In most cases the yields are in the order of several mCi.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.