Conceptual design of a Cs<sub>2</sub>LiLaBr<sub>6</sub> scintillator-based neutron total cross section spectrometer on the Back-n beam line at CSNS

Da-Jun Zhao; Song Feng; Pin-Jing Cheng; Rong Liu; Wen Luo; Hao-Qiang Wang; Jie-Ming Xue; Kun Zhu; Bo Zheng

doi:10.1007/s41365-022-01152-5

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Conceptual design of a Cs₂LiLaBr₆ scintillator-based neutron total cross section spectrometer on the Back-n beam line at CSNS

NUCLEAR ELECTRONICS AND INSTRUMENTATION | Updated：2023-02-13

- Conceptual design of a Cs₂LiLaBr₆ scintillator-based neutron total cross section spectrometer on the Back-n beam line at CSNS
- Nuclear Science and Techniques Vol. 34, Issue 1, Article number: 3(2023)
- Affiliations：
  
  1.School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
  2.Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
- Author bio：
  
  † fengs9115@gmail.com
- Funds：
- DOI：10.1007/s41365-022-01152-5
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Da-Jun Zhao, Song Feng, Pin-Jing Cheng, et al. Conceptual design of a Cs₂LiLaBr₆ scintillator-based neutron total cross section spectrometer on the Back-n beam line at CSNS. [J]. Nuclear Science and Techniques 34(1):3(2023)
DOI：

Da-Jun Zhao, Song Feng, Pin-Jing Cheng, et al. Conceptual design of a Cs₂LiLaBr₆ scintillator-based neutron total cross section spectrometer on the Back-n beam line at CSNS. [J]. Nuclear Science and Techniques 34(1):3(2023) DOI： 10.1007/s41365-022-01152-5.

摘要

Abstract

To reduce the experimental uncertainty in the ,235,U resonance energy region and improve the detection efficiency for neutron total cross-section measurements compared with those obtained with the neutron total cross-section spectrometer (NTOX), a dedicated lithium-containing scintillation detector has been developed on the Back-n beam line at the China Spallation Neutron Source (CSNS). The Fast Scintillator-based Neutron Total Cross Section (FAST) spectrometer has been designed based on a Cs,2,LiLaBr,6, (CLLB) scintillator considering the ,γ,-ray flash and neutron environment on the Back-n beam line. The response of the CLLB scintillator to neutrons and ,γ,-rays was evaluated with different ,6,Li/,7,Li abundance ratios using Geant4. The neutron-,γ, discrimination performance of the CLLB has been simulated considering different scintillation parameters, physical designs, and light readout modes. A cubic ,6,Li-enriched (gt;90%) CLLB scintillator, which has a thickness of 4-9 mm and side length of no less than 50 mm to cover the ,Φ,50 mm neutron beam at the spectrometer position, has been proposed coupling to a side-readout SiPM array to construct the FAST spectrometer. The developed simulation techniques for neutron-,γ, discrimination performance could provide technical support for other neutron-induced reaction measurements on the Back-n beam line.

关键词

Keywords

Neutron total cross sectionCLLB scintillatorGeant4Pulse shape discrimination(PSD)

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Conceptual design of a Cs2LiLaBr6 scintillator-based neutron total cross section spectrometer on the Back-n beam line at CSNS

DOI：10.1007/s41365-022-01152-5

摘要

Abstract

关键词

Keywords

references

Conceptual design of a Cs₂LiLaBr₆ scintillator-based neutron total cross section spectrometer on the Back-n beam line at CSNS