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CsI-bowl: an ancillary detector for exit channel selection in γ-ray spectroscopy experiments

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Abstract

A particle detector array designed for light-charged particles, known as the CsI-bowl, was built for exit channel selection for in-beam \(\gamma\)-ray spectroscopy experiments. This device is composed of 64 CsI(Tl) detectors, organized in a structure reminiscent of a tea-bowl. High quantum efficiency photodiodes, characterized by their minimal mass, were employed to collect scintillation light. Its design, construction, particle identification resolution, and its effectiveness in relation to exit channel selection are described in this paper. In source tests, the optimal figure of merit for the identification of \(\alpha\)-particles and \(\gamma\)-rays using the charge comparison method was found to be 3.3 and 12.1 for CsI detectors coupled to photodiodes and avalanche photodiodes, respectively. The CsI-bowl demonstrated effectiveness in identifying particles, specifically the emission of protons and \(\alpha\)-particles in the \(^{58}\)Ni(\(^{19}\)F, xpyn) fusion–evaporation reaction, thereby enabling the selection of the desired exit channels.

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Data availability

The data that support the findings of this study are openly available in Science Data Bank at https:/www./doi.org/10.57760/sciencedb.10201 and https://cstr.cn/31253.11.sciencedb.10201.

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Acknowledgements

The exceptional skill demonstrated by the staff from the Crystal Group at IMPCAS during the construction of the CsI-bowl, as well as the outstanding collaboration with the Nuclear Reaction Group from the China Institute of Atomic Energy during preamplifier testing, is greatly appreciated. The authors also extend their gratitude toward the technical staff and accelerator group at iThemba LABS for their consistent support throughout the experiment.

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Authors and Affiliations

  1. Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai, 264209, China

    Xing-Chi Han, Shuo Wang, Yue-Zhao Zhang & Shou-Yu Wang

  2. WeiHai Research Institute of Industrial Technology of Shandong University, Weihai, 264209, China

    Xing-Chi Han, Shuo Wang, Yue-Zhao Zhang & Shou-Yu Wang

  3. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, China

    Hong-Yi Wu & Zhi-Huan Li

  4. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 73000, China

    Guo-Zhu Shi & Ruo-Fu Chen

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  1. Xing-Chi Han
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  2. Shuo Wang
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  3. Hong-Yi Wu
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Shuo Wang, Xing-Chi Han, Hong-Yi Wu, Zhi-Huan Li, and Shou-Yu Wang. The first draft of the manuscript was written by Xing-Chi Han and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Shuo Wang.

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The authors declare that they have no competing interests.

Additional information

This work was supported by the Major program of Natural Science Foundation of Shandong Province (No. ZR2020ZD30), the National Natural Science Foundation of China (Nos. 11775133, U2167202, U1432119).

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Han, XC., Wang, S., Wu, HY. et al. CsI-bowl: an ancillary detector for exit channel selection in γ-ray spectroscopy experiments. NUCL SCI TECH 34, 133 (2023). https://doi.org/10.1007/s41365-023-01289-x

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