Direct Unfolding Determination of Energy Spectra for Laser Compton Slant-Scattering ??-Ray Beams Using a LaBr3 Detector

分类： 核科学技术 >> 辐射物理与技术 提交时间： 2025-05-23

Longxiang Liu Gongtao Fan Hongwei Wang Hanghua Xu Yue Zhang Zirui Hao Chuangye He Pu Jiao Shan Ye Yuxuan Yang Sheng Jin Kaijie Chen Qiankun Sun Zhenwei Wang Mengke Xu XiangFei Wang Mengjie Zhou Yulong Chen Chang Yang

摘要： A 3-inch × 4-inch LaBr3 detector was employed to characterize the energy distributions of quasi-monoenergetic 𝛾-rays generated at the Shanghai Laser Electron Gamma Source (SLEGS), part of the Shanghai Synchrotron Radiation Facility. Systematic calibration of the detector’s response was conducted at the China Institute of Atomic Energy using monoenergetic 𝛾-rays from (p,𝛾) nuclear reactions on LiF, 27Al, and 13C targets. Energy spectrum unfolding was performed through an iterative matrix inversion algorithm, employing the detector’s monoenergetic response functions as kernel elements in the linear equation system. This approach facilitated direct reconstruction of 𝛾-ray energy spectra from raw detector signals. Validation experiments comparing LaBr3 and BGO detector reconstructions under identical conditions revealed strong agreement between the two detection systems. The methodology successfully characterized 𝛾-ray beam energy profiles resulting from slant-scattering processes at SLEGS, demonstrating robust performance in complex analysis.

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