Neutron activation in interrupted neutron beams

IF 1.8 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2025-05-22 DOI:10.1016/j.apradiso.2025.111896

Lauri Wendland, Liisa Porra, Tiina Seppälä, Mikko Tenhunen

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引用次数: 0

Abstract

Neutron activation of activation targets in neutron beams with interruptions is studied. A simple and robust formalism for determining the number of activated atoms in neutron activation measurement despite beam interruptions is derived. Two simplified methods for correcting for the decay of produced nuclei in the activation target during beam interruptions are obtained and equations for using them are presented. The error of the simplifications done in the correction methods is quantified for Mn and Au activation targets and typical BNCT quality assurance measurement conditions. Upper limits on the duration of interruptions are established for keeping the impact of the simplifications on the total measurement uncertainty small when resuming irradiation after beam breaks. With these corrections methods and respecting the obtained upper limits on total pause duration, quality assurance neutron activation measurements in BNCT can be accomplished even if the neutron beam contains pauses, thus saving time from resetting the experimental setup each time an interruption occurs.

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中断中子束中的中子活化

研究了中断中子束中活化靶的中子活化。导出了一种简单而可靠的公式，用于确定中子活化测量中不受束流中断影响的活化原子数。本文给出了两种校正在束流中断过程中活化靶中产生的核衰变的简化方法，并给出了使用它们的公式。在Mn和Au活化靶和典型的BNCT质量保证测量条件下，对修正方法的简化误差进行了量化。为了使光束断裂后恢复辐照时简化对总测量不确定度的影响较小，建立了中断时间的上限。通过这些校正方法，并考虑到获得的总暂停时间上限，即使中子束包含暂停，也可以在BNCT中完成质量保证中子激活测量，从而节省了每次发生中断时重新设置实验装置的时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.