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Proof-of-principle demonstration of epithermal neutron resonance spectroscopy utilizing a compact laser-driven electron accelerator.

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Title: Proof-of-principle demonstration of epithermal neutron resonance spectroscopy utilizing a compact laser-driven electron accelerator.
Authors: Jie Feng1, Jie Ren2, Hao Xu1, Mingyang Zhu1, Bingzhan Shi1, Guoqiang Zhang3, Jie Bao2, Wenchao Yan1, Yifei Li4, Jinguang Wang4, Xin Lu4, Liming Chen1,5 lmchen@sjtu.edu.cn, Jie Zhang1,5 jzhang1@sjtu.edu.cn
Source: Proceedings of the National Academy of Sciences of the United States of America. 10/7/2025, Vol. 122 Issue 40, p1-5. 5p.
Subjects: Neutron resonance, Particle accelerators, Properties of matter, High resolution spectroscopy, Radioactive substances, Neutron generators, Nondestructive testing
Abstract: Epithermal neutron resonance spectroscopy is a key nondestructive approach for discerning material properties. However, the existing spallation and accelerator-based photonuclear neutron sources employed in this spectroscopy are huge and immobile, restricting their application in specialized scenarios. Here, we demonstrate a compact short-pulsed photonuclear neutron source driven by a terawatt femtosecond laser-based electron accelerator. After moderation, this neutron source maintains an outstanding time-resolution of 0.8 μs at 5 eV, and its energy resolution can be less than3%at a flight distance 1.72 m. When this compact neutron resonance spectroscopy facility is utilized to examine silver (Ag) and indium (In) metal sheets with a high signal-to-noise ratio, it distinctly reveals the shape of resonance absorption peaks for 115In at 1.46 eV and 109Ag at 5.19 eV. This laser-driven electron accelerator offers a solution, overcoming traditional source drawbacks and holding great potential for on-site nuclear material analysis and high-precision nuclear data acquisition. [ABSTRACT FROM AUTHOR]
Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: egs
DbLabel: Engineering Source
An: 188825062
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Proof-of-principle demonstration of epithermal neutron resonance spectroscopy utilizing a compact laser-driven electron accelerator.
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  Data: <searchLink fieldCode="AR" term="%22Jie+Feng%22">Jie Feng</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jie+Ren%22">Jie Ren</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hao+Xu%22">Hao Xu</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mingyang+Zhu%22">Mingyang Zhu</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bingzhan+Shi%22">Bingzhan Shi</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Guoqiang+Zhang%22">Guoqiang Zhang</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Jie+Bao%22">Jie Bao</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wenchao+Yan%22">Wenchao Yan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yifei+Li%22">Yifei Li</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Jinguang+Wang%22">Jinguang Wang</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Xin+Lu%22">Xin Lu</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Liming+Chen%22">Liming Chen</searchLink><relatesTo>1,5</relatesTo><i> lmchen@sjtu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Jie+Zhang%22">Jie Zhang</searchLink><relatesTo>1,5</relatesTo><i> jzhang1@sjtu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America%22">Proceedings of the National Academy of Sciences of the United States of America</searchLink>. 10/7/2025, Vol. 122 Issue 40, p1-5. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Neutron+resonance%22">Neutron resonance</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+accelerators%22">Particle accelerators</searchLink><br /><searchLink fieldCode="DE" term="%22Properties+of+matter%22">Properties of matter</searchLink><br /><searchLink fieldCode="DE" term="%22High+resolution+spectroscopy%22">High resolution spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+substances%22">Radioactive substances</searchLink><br /><searchLink fieldCode="DE" term="%22Neutron+generators%22">Neutron generators</searchLink><br /><searchLink fieldCode="DE" term="%22Nondestructive+testing%22">Nondestructive testing</searchLink>
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  Data: Epithermal neutron resonance spectroscopy is a key nondestructive approach for discerning material properties. However, the existing spallation and accelerator-based photonuclear neutron sources employed in this spectroscopy are huge and immobile, restricting their application in specialized scenarios. Here, we demonstrate a compact short-pulsed photonuclear neutron source driven by a terawatt femtosecond laser-based electron accelerator. After moderation, this neutron source maintains an outstanding time-resolution of 0.8 μs at 5 eV, and its energy resolution can be less than3%at a flight distance 1.72 m. When this compact neutron resonance spectroscopy facility is utilized to examine silver (Ag) and indium (In) metal sheets with a high signal-to-noise ratio, it distinctly reveals the shape of resonance absorption peaks for 115In at 1.46 eV and 109Ag at 5.19 eV. This laser-driven electron accelerator offers a solution, overcoming traditional source drawbacks and holding great potential for on-site nuclear material analysis and high-precision nuclear data acquisition. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1073/pnas.2518397122
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        Text: English
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        PageCount: 5
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      – SubjectFull: Neutron resonance
        Type: general
      – SubjectFull: Particle accelerators
        Type: general
      – SubjectFull: Properties of matter
        Type: general
      – SubjectFull: High resolution spectroscopy
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      – SubjectFull: Radioactive substances
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      – SubjectFull: Neutron generators
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      – SubjectFull: Nondestructive testing
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              Text: 10/7/2025
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