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Photonuclear production of nuclear isomers using bremsstrahlung induced by laser-wakefield electrons

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Abstract

In this study, we theoretically investigate the feasibility of using laser-wakefield accelerated (LWFA) electrons for the photonuclear measurement of nuclear isomers according to the characteristics of the electrons obtained from LWFA experiments conducted at the Compact Laser–Plasma Accelerator (CLAPA) laboratory. The experiments at the CLAPA show that a stable electron beam with an energy of 78–135 MeV and a charge of 300–600 pC can be obtained. The bremsstrahlung spectra were simulated using Geant4, which suggests that a bremsstrahlung source with a peak intensity of 10\(^{19}\) photons/s can be generated. Theoretical calculations of isomer production cross sections from the photonuclear reactions on six target nuclei, \(^{197}\)Au, \(^{180}\)Hf, \(^{159}\)Tb, \(^{115}\)In, \(^{103}\)Rh, and \(^{90}\)Zr, were performed and compared with the available experimental data in EXFOR, which suggest that further experiments are required for a series of photonuclear reaction channels. Flux-averaged cross sections and isomer ratios (IR) resulting from such bremsstrahlung sources are theoretically deduced. The results suggest that IR measurements can be used to constrain nuclear components, such as \(\gamma\) strength function and optical model potential. In addition, the detection of the decay characteristics was evaluated with Geant4 simulations. The use of the LWFA electron beam and its bremsstrahlung for photonuclear studies involving nuclear isomers is anticipated.

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Data availability

The data that support the findings of this study are openly available in Science Data Bank at https://doi.org/10.57760/sciencedb.j00186.00066 and https://cstr.cn/31253.11.sciencedb.j00186.00066.

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Acknowledgements

The authors thank the staff of the 200 TW laser of CLAPA laboratory for the smooth operation of the machine.

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Authors and Affiliations

  1. State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing, 100871, China

    Hao-Yang Lan, Di Wu, Jia-Xin Liu, Jian-Yao Zhang, Huan-Gang Lu, Jian-Feng Lv, Xue-Zhi Wu & Xue-Qing Yan

  2. School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China

    Wen Luo

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  1. Hao-Yang Lan
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  2. Di Wu
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  8. Wen Luo
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  9. Xue-Qing Yan
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Hao-Yang Lan, Di Wu, Jia-Xin Liu, Jian-Yao Zhang, Huan-Gang Lu, Jian-Feng Lv, and Xue-Zhi Wu. The first draft of the manuscript was written by Hao-Yang Lan and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Xue-Qing Yan.

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Conflict of interest

Xue-Qing Yan is an editorial board member for Nuclear Science and Techniques and was not involved in the editorial review, or the decision to publish this article. All authors declare that there are no competing interests.

Additional information

This work was supported by the National Natural Science Foundation of China (Nos. 11921006, U2230133), Beijing Outstanding Young Scientists Program, National Grand Instrument Project (No. 2019YFF01014400), National Key R&D Program of China (No. 2022YFA1603303), and Open Foundation of Key Laboratory of High Power Laser and Physics, Chinese Academy of Sciences (No. SGKF202104).

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Lan, HY., Wu, D., Liu, JX. et al. Photonuclear production of nuclear isomers using bremsstrahlung induced by laser-wakefield electrons. NUCL SCI TECH 34, 74 (2023). https://doi.org/10.1007/s41365-023-01219-x

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  • DOI: https://doi.org/10.1007/s41365-023-01219-x

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