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通过溶液生长的反式二苯乙烯闪烁体进行质子响应和中子能谱展开

Proton response and neutron spectrum unfolding by solution-grown trans-stilbene scintillator.

作者信息

Quang Nguyen Duy, Kim H J, Kim Sunghwan, Kang Sinchul, Vuong Phan Quoc, Hieu Phan Bao Quoc, Cuong Nguyen Kien, Yoon Y S, Nam Uk-Won

机构信息

Department of Physics, Kyungpook National University, Daegu, 41566, Republic of Korea.

Dalat Nuclear Research Institute, Dalat, Vietnam.

出版信息

Sci Rep. 2025 Jan 28;15(1):3506. doi: 10.1038/s41598-024-85087-4.

DOI:10.1038/s41598-024-85087-4
PMID:39875473
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11775217/
Abstract

This paper reports the proton response function for solution-grown trans-stilbene scintillator from 1 to 25 MeVee and its application for unfolding neutron spectra of Cf-252 and AmBe sources. Low energy proton response was measured by the Time-of-Flight technique at the Korea Research Institute of Standards and Science. In contrast, high energy response was investigated using a 45 MeV proton beam at the Korea Institute of Radiological & Medical Sciences. The photomultiplier tube nonlinearity effect was studied and corrected for high-energy measurement. Several energy calibration functions were examined to minimize the effects of the light yield nonlinearity of the scintillator, which was observed as nonnegligible in the measurement. A new approach was applied to obtain 1.3 ns full width at half maximum timing resolution in the Time-of-Flight experiment when using a 500 Mega samples per second analog to digital converter. The unfolding was performed using the iterative Bayesian method without any constraints, smoothness, or assumption of prior knowledge of original spectra. For the first time, we achieved one of the best unfolding results for both Cf-252 and AmBe spectra. Results from this study are promising for fast neutron spectroscopy.

摘要

本文报道了溶液生长反式芪闪烁体在1至25MeVee能量范围内的质子响应函数及其在展开Cf - 252和AmBe源中子能谱中的应用。低能质子响应在韩国标准科学研究院采用飞行时间技术进行测量。相比之下，高能响应在韩国放射医学科学研究所利用45MeV质子束进行研究。对光电倍增管非线性效应进行了研究，并针对高能测量进行了校正。研究了几种能量校准函数，以尽量减小闪烁体光产额非线性的影响，该影响在测量中不可忽略。在使用每秒500兆采样的模数转换器进行飞行时间实验时，应用了一种新方法来获得1.3纳秒的半高宽定时分辨率。展开过程采用迭代贝叶斯方法，无需任何约束、平滑处理或对原始能谱先验知识的假设。首次在Cf - 252和AmBe能谱上均取得了最佳展开结果之一。本研究结果对快中子能谱学很有前景。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/8fed72b3afd9/41598_2024_85087_Fig16_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/85ba42d6d721/41598_2024_85087_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/56c5028f6a24/41598_2024_85087_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/ef9d0c854a67/41598_2024_85087_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/b722e8171715/41598_2024_85087_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/3d87000d3618/41598_2024_85087_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/9cb3423f4993/41598_2024_85087_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/ac63ae8ab2e2/41598_2024_85087_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/ff806f582a84/41598_2024_85087_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/58b90cefa8a4/41598_2024_85087_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/a9236785c245/41598_2024_85087_Fig14_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/2a4cb5d5f785/41598_2024_85087_Fig15_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d859/11775217/8fed72b3afd9/41598_2024_85087_Fig16_HTML.jpg

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