Prediction of neutron production and energy spectrum by the inverse kinematic reaction between an incident 7Li3+ beam and a proton target in PHITS

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 : 2025-06-30 DOI:10.1016/j.nimb.2025.165783

Toshiro Sakabe , Antonino Cannavo , Shunsuke Ikeda , Takeshi Kanesue , Madhawa Horana Gamage , Giovanni Ceccio , Kazumasa Takahashi , Masahiro Okamura

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引用次数: 0

Abstract

A neutron source using the inverse kinematic reaction between lithium and proton, p(⁷Li, n)⁷Be, achieves forward-directed neutrons, potentially enhancing neutron yield in the forward direction. Despite the advantage, no evaluated-cross-section data for this reaction can be used in Monte Carlo simulation codes, such as PHITS. To solve this problem, this study aims to evaluate the applicability of the user-defined cross-section data, Frag data, for p (⁷Li, n)⁷Be in PHITS. The simulations reproduced collisions between ⁷Li³⁺ ions and polypropylene targets. The Frag data was edited based on the JENDL-5 by utilizing the two-body collision kinematics. The neutron yield and angular distribution were investigated in the simulation. As a result, the forward neutron convergence with a reasonable neutron yield and energy spectrum was observed. The expected neutron yield in the forward 1-steradian area is 2.46 × 10¹⁰n/s when lithium-ion energy and current are 16.45 MeV and 0.1 mA.

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PHITS中入射7Li3+束与质子靶之间逆运动学反应的中子产生和能谱预测

一个中子源利用锂和质子之间的逆运动学反应，p(7Li, n)7Be，实现正向中子，潜在地提高正向中子产率。尽管有这样的优点，但该反应的评估截面数据不能用于蒙特卡罗模拟代码，如PHITS。为了解决这一问题，本研究旨在评估自定义截面数据Frag数据在PHITS中的p (7Li, n)7Be的适用性。模拟再现了7Li3+离子与聚丙烯靶之间的碰撞。基于JENDL-5，利用二体碰撞运动学对fragg数据进行编辑。在模拟中研究了中子产率和角分布。结果表明，中子正向收敛具有合理的中子产率和能谱。当锂离子能量和电流分别为16.45 MeV和0.1 mA时，前1标准区域的预期中子产率为2.46 × 1010n/s。

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

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.