Time response of an undoped LaCl3 crystal

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-08-22 DOI:10.1016/j.radphyschem.2025.113239

M. Caballero , V. Sánchez-Tembleque , L.M. Fraile , C. Fonseca-Vargas , S. Gaitán , H.J. Kim , V. Martínez-Nouvilas , M. Martínez-Roig , E. Nácher , J.M. Udías , P.Q. Vuong

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引用次数: 0

Abstract

We have characterized a detector equipped with an undoped LaCl

_{3}

truncated cone crystal with dimensions of 22.5 mm in the largest diameter, 16 mm in the smallest diameter, and 16 mm in height, coupled to a fast Photonis XP2020/URQ photomultiplier tube (PMT). Its time response at 511 keV (²²Na) and ⁶⁰Co photon energies has been measured against a reference detector using a fast digitizer module by digital signal processing methods based on a genetic algorithm. The time resolution was optimized by the choice of the photomultiplier bias voltage and the fine-tuning of the digital parameters of the time pickup algorithm. The de-convoluted full width at half maximum (FWHM) time resolution is found to be 250 ± 10 ps at ⁶⁰Co energies, and 444 ± 8 ps using positron annihilation

γ

-rays from ²²Na, providing good prospects for the use of the crystal in applications requiring a fast time response.

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未掺杂LaCl[公式略]晶体的时间响应

我们对一种探测器进行了表征，该探测器配备了一个未掺杂的LaCl3截锥晶体，其最大直径为22.5 mm，最小直径为16 mm，高度为16 mm，与快速Photonis XP2020/URQ光电倍增管（PMT）耦合。在511 keV （22Na）和60Co光子能量下，采用基于遗传算法的数字信号处理方法，利用快速数字化模块对参考探测器进行了时间响应测量。通过光电倍增管偏置电压的选择和时间采集算法数字参数的微调，优化了时间分辨率。在60Co能量下的半最大解卷积全宽（FWHM）时间分辨率为250±10 ps，在22Na的正电子湮没γ射线下为444±8 ps，为该晶体在需要快速时间响应的应用中提供了良好的前景。

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.