A Novel, Low-Cost, Position-Sensitive Neutron Detector to Support Thick-Target Inverse Kinematics Experiments for Nuclear Data Measurements
A Novel, Low-Cost, Position-Sensitive Neutron Detector to Support Thick-Target Inverse Kinematics Experiments for Nuclear Data Measurements
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一种新型、低成本、位置敏感中子探测器，支持核数据测量的厚目标逆运动学实验
DOI：
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
L. Thompson
中科院分区：
文献类型：
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作者：
R. Smith;J. Stowell;D. Barker;L. Thompson
高质量的核数据是精确模拟恒星系统和地面核反应堆的核心。然而，一些关键的反应截面具有很大的不确定性，这限制了这些模型在预测同位素丰度和恒星演化的其他方面，以及核反应堆的关键操作参数方面。涉及中子的反应在实验室中特别难进行实验测量，尤其是因为在检测中子时涉及到独特的挑战。我们提出了一种利用厚靶逆运动学(TTIK)方法测量涉及中子的核反应的新方法。对于这种测量，一种名为ATTIKUS(谢菲尔德大学的厚靶反向运动学探测器)的新探测器正在建造中。在这里，我们介绍了探测器的设计和Geant4蒙特卡罗模拟。模拟结果表明，该装置可获得10 cm的中子位置重建分辨率，并可用于13C(α，n)反应，该反应被认为是低质量渐近巨星S过程的主要中子源。在TTIK方法中，中子的发射位置(气态靶中的核相互作用位置)与反应的质心能量直接相关。因此，位置分辨率将转化为能量分辨率，这取决于波束和目标的组合。核反应堆中的逆反应16O(n，α)在计算有效中子倍增因子Kef时会产生很大的不确定度，因此需要改进。
High quality nuclear data lie at the heart of accurately modelling stellar systems and terrestrial nuclear reactors. However, some key reaction cross sections have large uncertainties, which limit such models in predicting isotopic abundances and other aspects of stellar evolution, along with key operational parameters for nuclear reactors. Reactions involving neutrons are particularly difficult to measure experimentally in laboratories, not least due to the unique challenges involved when detecting neutrons. We present a new approach to measuring nuclear reactions involving neutrons by exploiting the Thick-Target Inverse Kinematics (TTIK) approach. For such measurements, a new detector called ATTIKUS (A Thick-Target Inverse Kinematics detector by Universities in Sheffield) is under construction. Here we present designs and Geant4 Monte-Carlo simulations of the detector. The simulations indicate that a neutron position reconstruction resolution of 10 cm is obtainable and demonstrate how this device could be applied to the 13C(α, n) reaction, which is considered to be the main neutron source for the s-process in low-mass Asymptotic Giant Branch stars. In the TTIK method, the emission position of the neutron (the nuclear interaction position in a gaseous target) is directly linked to the centre-of-mass energy of the reaction. Therefore, a position resolution will translate into an energy resolution, depending on the beam-target combination. The inverse reaction, 16O(n, α), causes a large uncertainty in calculating the effective neutron multiplication factor, Keff in nuclear reactors, so improvements are required here.
DOI：
10.1140/epjp/i2018-12295-3
发表时间：
2018-10
期刊：
The European Physical Journal Plus
影响因子：
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作者：
R. Reifarth;P. Erbacher;S. Fiebiger;K. Göbel;T. Heftrich;M. Heil;F. Käppeler;N. Klapper;D. Kurtulgil;C. Langer;C. Lederer-Woods;A. Mengoni;B. Thomas;S. Schmidt;M. Weigand;M. Wiescher
通讯作者：
R. Reifarth;P. Erbacher;S. Fiebiger;K. Göbel;T. Heftrich;M. Heil;F. Käppeler;N. Klapper;D. Kurtulgil;C. Langer;C. Lederer-Woods;A. Mengoni;B. Thomas;S. Schmidt;M. Weigand;M. Wiescher
影响因子：
3.1
作者：
K. Gallmeister;U. Mosel;J. Weil
通讯作者：
K. Gallmeister;U. Mosel;J. Weil