中子激活分析中记录的实验伽马符合谱

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-10-23 DOI:10.1007/s10967-024-09822-x

Jeremy Roult dit Rouaux, Cedric Carasco, Laurent Loubet, Bertrand Perot, Leonie Tamagno, Johann Collot

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引用次数: 0

摘要

利用脉冲DT中子发生器、聚乙烯石墨电池和8个大型NaI（Tl）闪烁体对伽马-伽马符合测量在伽马中子激活分析中的可行性进行了实验研究。用伽马-伽马重合产生的多维能谱测量检测限，并与HPGe探测器能谱进行比较。当中子发射量为2.5 × 108 n.s−1时，在20 min内对硫的检出限约为15 g，而使用HPGe探测器光谱时，对硫的检出限大于200 g。处理多达三个同步伽马射线能量的总和突出了镝样品的有用信号，并允许在不锈钢组成的转子模型中检测含有4%质量镝的永磁体。

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Experimental gamma coincidence spectra recorded in prompt gamma neutron activation analysis

A feasibility study of gamma-gamma coincidence measurements in prompt gamma neutron activation analysis is carried out experimentally with a pulsed DT neutron generator, a polyethylene graphite cell and eight large NaI(Tl) scintillators. Detection limits are measured with multidimensional energy spectra created in gamma-gamma coincidence and compared to HPGe detector spectra. With a neutron emisison of 2.5 × 10⁸ n.s⁻¹, the detection limit for sulfur is about 15 g in 20 min, while the detection limit is larger than 200 g when using the HPGe detector spectra. Processing the summ of up to three coincident gamma-ray energies highlights useful signal for a dysprosium sample, and allows for detecting permanent magnets containing 4% mass dysprosium within a rotor mock-up composed of stainless steel.

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.