Coincidence time resolution investigation of BaF2-based H6610 detectors for a digital positron annihilation lifetime spectrometer

Coincidence time resolution investigation of BaF2-based H6610 detectors for a digital positron annihilation lifetime spectrometer
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用于数字正电子湮没寿命谱仪的 BaF2 基 H6610 探测器的符合时间分辨率研究

DOI:
10.1088/1748-0221/15/06/p06001
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发表时间:
2020-06
影响因子:
1.3
通讯作者:
Bangjiao Ye
Bangjiao Ye
中科院分区:
工程技术4区
文献类型:
--
作者:
R. Ye;Qi Zhao;Haibo Wang;Bingchuan Gu;Ziwen Pan;J.D. Liu;Bangjiao Ye

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基于BaF₂的探测器已用于许多需要快速定时的领域,特别是在正电子湮没寿命(PAL)光谱学中。PAL光谱仪的性能与基于BaF₂的探测器的时间响应密切相关。因此,选择具有优异时间分辨率的闪烁探测器非常重要。在这项工作中,使用数字示波器研究了基于BaF₂的H6610探测器的符合时间分辨率。通过调节电源电压、示波器的采样率和数字分数常数,对探测器的时间响应进行了优化,对于0.511 MeV的湮没γ射线对和⁶⁰Co级联γ射线分别实现了约162 ps和108 ps的符合时间分辨率。此外,开发了一种由两个基于BaF₂的H6610探测器和一台示波器组成的数字PAL光谱仪,其时间分辨率约为130 ps,比大多数数字PAL光谱仪要好得多。
BaF2-based detectors have been used in many fields requiring fast timing, especially in positron annihilation lifetime (PAL) spectroscopy. The performance of a PAL spectrometer is closely correlated with the time response of BaF2-based detectors. Therefore, it is important to select scintillation detectors with excellent time resolution. In this work, the coincidence time resolution of BaF2-based H6610 detectors was investigated using a digital oscilloscope. The time response of detectors has been optimized by tuning the supply voltages, the sampling rate of the oscilloscope, and digital fraction constants, achieving a conicidence time resolution of about 162 ps for the 0.511 MeV annihilation γ-ray pairs and 108 ps for the 60Co cascade γ-rays, respectively. Furthermore, a digital PAL spectrometer composed of two BaF2-based H6610 detectors and an oscilloscope was developed with a time resolution of around 130 ps, much better than most digital PAL spectrometers.
使用 LYSO 和 LFS-3 闪烁体的基于 SiPM 的新型正电子湮没寿命谱仪
DOI: 10.1016/j.nima.2020.163662
发表时间: 2020-04
期刊: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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